Publications



  1. Synthesis of vinyl sulfides and thioethers via hydrothiolation reaction of 4-hydroxydithiocoumarin and arylacetylenes/styrenes
    S. Mondal, S. Yashmin and Abu T. Khan* Org. Biomol. Chem., ASAP, 2021.
  2. An environmentally benign regioselective synthesis of 2-benzyl-4-arylquinoline derivatives using aryl amines, styrene oxides and acetylenes
    S. Ali and Abu T. Khan* Org. Biomol. Chem., 19, 8772-8782, 2021.
  3. Metal-free synthesis of quinoline-2,4-dicarboxylate derivatives using aryl amines and acetylenedicarboxylates through a pseudo three-component reaction
    S. Ali and Abu T. Khan* Org. Biomol. Chem., 19, 7041-7050, 2021.
  4. Synthesis of biologically active fused 1,4-oxathiin derivatives from 4-hydroxydithiocoumarins, arylacetylenes and dimethyl sufoxide by Cu(I) catalyzed C-H functionalization and cross-dehydrogentive C-S coupling reactions
    S. Mondal, S. Yasmin, R. Ali, R. Soundaram, S. S. Ghosh and Abu T. Khan* Org. Biomol. Chem., 19, 5818-5826, 2021.
  5. Copper (II) triflate catalyzed three-component reaction for the synthesis of 2,3-diarylquinoline derivatives using aryl amines, aryl aldehyde and styrene oxides
    S. Ali and Abu T. Khan* Org. Biomol. Chem, 19, 3255-3262, 2021.
  6. Ytterbium (III) triflate catalyzed domino reaction of aryl amines and styrene oxides: Synthesis of 2-benzyl-3arylquinoline derivatives
    S. Ali and Abu T. Khan* Tetrahedron Lett., 70, 152981, 2021.
  7. 'Anti-cancer potential of (1,2-dihydronaptho[2,1-b]furan-2-yl) methanone derivatives'
    K. Islam, K. Pal, U. Debnath, R. S. Basha, Abu T. Khan, K. Jana and A. K. Misra Bioorg. Med. Chem. Lett., 30, 127476, 2020.
  8. Newly synthesized 3-sufenylindol derivatives from 4-hydroxydithiocoumarin using an oxidative cross dehydrigenative coupling reaction (OCDCR): potential lead molecules to antiproliferative activity
    S. Mondal, K. Mahato, N. Aroa, D. Kankane, U. P. Singh, S. Ali, A. H. Khan, S. S. Ghosh and Abu T. Khan*, Org. Biomol. Chem., 18, 4104-4113, 2020.
  9. Reaction behaviour of arylamines with nitroalkenes in the presence of bismuth(III) triflate: an easy access to 2,3-dialkylquinolines
    S. Ali, R. Gattu, V. Singh, S. Mondal, A. T. Khan,* G. Dubey and P. V. Bharatam Org. Biomol. Chem., 18, 1785-1793, 2020.
  10. Iodine monobromide catalysed regioselective synthesis of 3-arylquinoline from α-aminoacetophenone and β-nitrostyrene
    R. Gattu, S. Mondal, S. Ali and A. T. Khan,* Org. Biomol. Chem., 17, 347-353, 2019.
  11. Synthesis of benzothiazoles via condensation reaction of 2-aminothiophenols and β-oxodithioesters using a combination of PTSA and CuI as catalyst
    A. Ghosh, R. Gattu and A. T. Khan*, Chemistryselect 3, 13773-13776, 2018.
  12. Electronic effect of substituents on anilines favors 1,4-addition to trans-β-nitrostyrenes: access to n-substituted 3-arylindoles and 3-arylindoles
    R. Gattu, S. Bhattacharjee, K. Mahato and A. T. Khan*, Org. Biomol. Chem., 16, 3760-3770, 2018.
  13. Triethylamine mediated one-pot synthesis of benzo[f]chromene derivatives
    S. Bhattacharjee, R. Gattu and A. T. Khan,* ChemistrySelect, 3, 4760-4763, 2018.
  14. Indole derived “turn-on” fluorometric probe for dual detection of Hg2+ and Cu2+ ions at nanomolar level
    A. T. Khan*, A. A. Dar, A. K. Dwivedi, P. K Iyer, Asian J. Green Chem., 171-180, 2018.
  15. Iodine catalyzed synthesis of pyrrolo(2,3-c)coumarin derivatives using 3-aminocoumarins, arylglyoxals and 4-hydroxycoumarin through one-pot three component reaction
    M. Belal and A. T. Khan,* ChemistrySelect, 3, 2431-2434 2018.
  16. Synthesis of benzo[f]chromeno[3,4-b]quinoline-6-ones and chromeno[3,4-b]quinoline-6,11-diones via one-pot three-component tandem Knoevenagel–Michael reaction catalyzed by n-tetra butylammonium tribromide
    D. K. Das, A. Choudhury and A. T. Khan,* Asian J. Green Chem., 3, 115-131, 2018.
  17. An oxidative cross-coupling reaction of 4-hydroxydithiocoumarin and amines/thiols using a combination of I2 and TBHP: access to lead molecules for biomedical applications
    K. Mahato, N. Arora, P. R. Bagdi, R. Gattu and Abu T. Khan,* Chem. Commn., 54, 1513-1516, 2018.
  18. PTSA.H2O catalyzed reaction of 3-aminocoumarins and phenyl-acetaldehydes: a route to access various pyrido(2,3-c)coumarin derivatives
    M. Belal and A. T. Khan,* ChemistrySelect, 2, 10501-10504, 2017.
  19. Camphorsulfonic acid catalysed one-pot three component reaction for the synthesis of fused quinoline and benzoquinoline Derivatives
    R. Gattu, P. R. Bagdi, R. S. Basha and A. T. Khan,* J. Org. Chem., 82, 12416-12429, 2017.
  20. Structural, vibrational and NMR spectroscopic investigation of the newly synthesized 3-((ethylthio)(4-nitrophenyl)methyl)-1H-indole
    S. A. Bhat, A. A. Dar, S. Ahmad, A. T. Khan,* J. Mol. Struct., 1145, 94-101, 2017.
  21. K2CO3 catalysed regioselective synthesis of thieno[2,3-b]thiochromen-4-one oximes: Facile route to the corresponding amine and nitroso derivatives
    K. Mahato, P. R. Bagdi, A. T. Khan,* Org. Biomol. Chem., 15, 5625-5634, 2017.
  22. One-pot Synthesis and Evaluation of Antileishmanial Activities of Functionalized Salkyl/ aryl benzothiazole-2-carbothioate scaffold
    Ajaz A. Dar, Md. Shadab, Suman Khan, Nahid Ali and A. T. Khan,* J. Org. Chem., 81, 3149−3160, 2016.
  23. One-pot three component synthesis of 3,5-disubstituted 2,6-dicyanoaniline derivatives using 4-Dimethylaminopyridine as a catalyst
    Suchandra Bhattacharjee and A. T. Khan,* Tetrahedron Lett., 57, 2994-2997, 2016.
  24. Synthesis of 3-substituted carboxylate/carboxamide flavone derivatives from 4-hydroxycoumarin, β-nitrostyrene and alcohol/amine using multicomponent reaction
    Suchandra Bhattacharjee and A. T. Khan,* Tetrahedron Lett., 57, 1831–1834, 2016.
  25. Synthesis of fused oxazole-containing coumarin derivatives via oxidative cross coupling reaction using a combination of CuCl2 and TBHP
    Md. Belal and A. T. Khan,* RSC Adv., 6, 18891-18894, 2016.
  26. One-pot three-component regioselective synthesis of C1-functionalised 3-arylbenzo[f]quinolone
    Radhakrishna Gattu, R. Sidick Basha, Prasanta Ray Bagdi and A. T. Khan,* RSC Adv., 6, 11675-11682, 2016.
  27. Insights into the inhibitory mechanism of triazole-based small molecules on phosphatidylinositol-4,5-bisphosphate binding pleckstrin homology domain
    Gorai, S.; Ray Bagdi, P.; Borah, R.; Paul, D.; Santra, M. K.; Khan. A. T.; Manna, D.* Biochemistry and Biophysics Reports, 12, 75–86, 2015.
  28. Synthesis of Unsymmetrical Sulfides and Their Oxidation to Sulfones to Discover Potent Antileishmanial Agents
    Ajaz A. Dar, Nagasuresh Enjamuri, Md. Shadab, Nahid Ali, and A. T. Khan,* ACS Comb. Sci., 17, 671–681, 2015.
  29. A direct approach for the expedient synthesis of unsymmetrical ethers by employing bromodimethylsulfonium bromide (BDMS) mediated C–S bond cleavage of naphthalene-2-ol sulfides
    Kobirul Islam, R. Sidick Basha,† Ajaz A. Dar,† Deb K. Das† and A. T. Khan,* RSC Adv., 5, 79759-79764, 2015.
  30. Oxidative cross coupling reaction mediated by I2/H2O2: a novel approach for the construction of fused thiazole containing coumarin derivatives
    Md. Belal and A. T. Khan,* RSC Adv., 5, 104155-104163, 2015.
  31. Hydrated ferric sulfate [Fe2(SO4)3•xH2O]: an efficient and reusable catalyst for one-pot synthesis of 2H-indazole[2,1-b]phthalazine-triones
    Abhik Choudhury, Shahzad Ali, and A. T. Khan,* J. Korean Chem. Soc., 59, 280-283,2015.
  32. Bromodimethylsulfonium bromide: an efficient catalyst for one-pot synthesis of 4-phenacylidene flavene derivatives
    S. Bhattacharjee, D. K. Das, and A. T. Khan,* Tetrahedron Lett., 56, 2412-2415, 2015.
  33. Insights into the inhibitory mechanism of triazole-based small molecules on phosphatidylinositol-4,5-bisphosphate binding pleckstrin homology domain
    Sukhamoy Gorai, Prasanta Ray Bagdi, Rituparna Borah, Debasish Paul, Manas Kumar Santra, Abu Taleb Khan,* Debasis Manna,* Biochemistry and Biophysics Reports, 2, 75–86,2015.
  34. Synthesis of 2-triazolyl-imidazo[1,2-a]pyridine through a one-pot three-component reaction using a nano copper oxide assisted click-catalyst
    Prasanta Ray Bagdi, R. Sidick Basha and A. T. Khan,* RSC Adv., 5, 61337-61344,2015.
  35. One-pot synthesis of functionalized 4-hydroxy-3-thiomethylcoumarins: detection and discrimination of Co2+ and Ni2+ ions
    Ajaz A. Dar, Sameer Hussain, Debasish Dutta, Parameswar K. Iyer* and A. T. Khan,* RSC Adv., 5, 57749-57756, 2015.
  36. Exploration of C5-C6-Unsubstituted 1,4-Dihydropyridines for the construction of exo-Hexahydro-1H-chromeno[3,4-h][1,6]naphthyridine-3-carboxylates using Stereoselective Povarov Reaction
    K. Islam, D. K. Das, E. Akram and A. T. Khan,* Synthesis, 47, 2745-2755,2015.
  37. Beyond conventional routes, an unprecedented Metal-Free Chemoselective Synthesis of Anthranilate Esters via Multicomponent Reaction (MCR) Strategy
    S. Sarkar and A. T. Khan,* Chem. Comm., 51, 12673-12676,2015.
  38. Yb(OTf)3 catalysed regioselective synthesis of unusual di- and tri- substituted 3,4-dihydrothiochromeno[3,2-e][1,3]thiazin-5(2H)-one derivatives through a pseudo four-component hetero-Diels–Alder reaction
    K. Mahato, P. R. Bagdi and A. T. Khan,* RSC Adv., 5, 48104-48111, 2015.
  39. Synthesis of Pyrido(2,3-c)coumarin derivatives via Intramolecular Povarov Reaction
    Md. Belal, D. K. Das and A. T. Khan,* Synthesis, 47, 1109-1116, 2015.
  40. Synthesis of fully-substituted pyridines and dihydropyridines in a highly chemoselective manner utilizing a multicomponent reaction (MCR) strategy
    S. Sarkar, D. K. Das and A. T. Khan,* RSC Adv., 4, 53752-53760, 2014.
  41. L-Proline-Catalysed Unusual Product Formation from the Reaction of 4- Hydroxydithiocoumarin and Aldehydes through a Pseudo-Three-Component Reaction
    K. Mahato, P. R. Bagdi and A. T. Khan,* Synthesis, 25, 2438-2441, 2014.
  42. Hydrated ferric sulfate catalyzed synthesis of 5,6-unsubstituted 1,4-dihydropyridines using three-component reaction
    K. Islam, D. K. Das and A. T. Khan,* Tetrahedron Lett. 55, 5613-5617, 2014.
  43. A mild and efficient method for large scale synthesis of 3-aminocoumarins and its further application for the preparation of 4-bromo-3-aminocoumarins
    D. K. Das, S. Sarkar, M. M. Khan, Md. Belal and A. T. Khan,* Tetrahedron Lett. 55, 4869-4874, 2014.
  44. Copper oxide nanoparticle mediated ‘click chemistry’ for the synthesis of mono-, bis- and tristriazole derivatives from 10,10-dipropargyl-9-anthrone as a key building block
    P. R. Bagdi, R. Sidick Basha, P. K. Baruah and A. T. Khan,* RSC Adv., 4, 10652-10659, 2014.
  45. Synthesis of fused tetrahydropyrido[2,3-c]coumarin derivatives as potential inhibitors for dopamine d3 receptors, catalyzed by hydrated ferric sulfate
    D. K. Das, S. Sarkar, A. T. Khan,* P. Saravanan and S. Patra RSC Adv., 4, 3581-3590, 2014.
  46. Synthesis of unsymmetrical sulfides catalyzed by n-tetrabutyl-ammonium tribromide: A selective fluorescence probe for mercury ion
    A. A. Dar, S. Ali, A. Ghosh, A. T. Khan,* A. K. Dwivedi and P. K. Iyer* Sensors and Actuators B: Chemical, 193, 509-514, 2014.
  47. Hydrated ferric sulfate catalyzed synthesis of 3-[(alkyl/arylthio)(aryl)methyl]-1H-indole derivatives through one-pot reaction
    A. A. Dar, S. Ali and A. T. Khan,* Tetrahedron Lett. 55, 486-489, 2014.
  48. Ammonium Chloride-Catalyzed Three-Component Reaction for the Synthesis of Fused 4H-Chromene Derivatives in Aqueous Medium
    S. Bhattacharjee, D. K. Das and A. T. Khan,* Synthesis, 46, 73-80, 2014.
  49. Bromodimethylsulfonium Bromide (BDMS)-Catalyzed Synthesis of 1, 5-Benzodiazepines Using a Multi-Component Reaction Strategy
    S. Sarkar, J. K. Rai Deka, J. P. Hazra and A. T. Khan,* Synlett, 2601-2605, 2013.
  50. Sodium-Hydroxide-Mediated Synthesis of Highly Functionalized [1,6]-Naphthyridines in a One-Pot Pseudo Five-Component Reaction
    S. Sarkar, D. K. Das and A. T. Khan,* Eur. J. Org. Chem. 6823-6830, 2013.
  51. Nickel(II)chloride hexahydrate catalyzed reaction of aromatic aldehydes with 2-mercaptoethanol: formation of supramolecular helical assemblage of the product
    R. A. Laskar, N. A. Begum, M. H. Mir, Md. R. Rohman and A. T. Khan,* Tetrahedron Lett. 54, 5839-5844, 2013.
  52. Cobalt triflate catalyzed one-pot synthesis of fluorophore 1,4-dihydropyridine derivatives via Hantzsch Reaction
    P. R. Bagdi, R. Sidick Basha, M. Lal, R. Misra and A. T. Khan,* J. Indian Chem. Soc. 90, 1-10, 2013 (Invited by the Indian Chemical Society).
  53. Bromodimethylsulfonium bromide (BDMS) catalyzed synthesis of substituted pyrroles through a one-pot four-component reaction
    P. R. Bagdi, R. Sidick Basha, M. Lal and A. T. Khan,* Chem. Lett. 42, 939-941, 2013.
  54. 2,6-Pyridinedicarboxylic acid as organocatalyst for the synthesis of 1,5-benzodiazepines through one-pot reaction
    M. Lal, R. Sidick Basha, S. Sarkar and A. T. Khan,* Tetrahedron Lett. 54, 4264-4272, 2013.
  55. Synthesis of trisubstituted 1H-pyrazole-4-carbodithioate in a one-pot three-component condensation reaction catalyzed by ferric sulfate
    A. T. Khan,* A. Ghosh, R. Sidick Basha and M. H. Mir, Asian J. Org. Chem. 2, 126-129, 2013.
  56. Bromodimethylsulfonium bromide (BDMS) catalyzed synthesis of 2,3-unsaturated-O-glycosides via Ferrier rearrangement
    A. T. Khan,* R. Sidick Basha and M. Lal, ARKIVOC, (ii), 201-212, 2013.
  57. Regio- and diastereoselective synthesis of trans-2,3-dihydrofuran derivatives in an aqueous medium
    A. T. Khan,* M. Lal and R. Sidick Basha, Synthesis, 45, 406-412, 2013.
  58. Vanadium(IV) acetylacetonate catalysed stereoselective syntheses of ß-enaminoesters and ß-enaminones
    R. A. Laskar, N. A. Begum, M. H. Mir, S. Ali and A. T. Khan,* Tetrahedron Lett. 54, 436-440, 2013.
  59. A simple and expedient synthesis of functionalized pyrido[2,3-c] coumarin derivatives using molecular iodine catalyzed three-component reaction
    A. T. Khan,* D. K. Das, K. Islam and P. Das, Tetrahedron Lett. 53, 6418-6422, 2012.
  60. A useful and convenient synthetic protocol for iodination of organic substrates using a combination of vanadyl acetylacetonate, hydrogen peroxide and sodium iodide
    A. T. Khan* and S. Ali, Bull. Chem. Soc. Jpn., 85, 1239-1243, 2012.
  61. Silica Supported Perchloric Acid: an efficient catalyst for one-pot synthesis of functionalized tetrahydropyrimidine derivatives
    A. T. Khan,* M. M. Khan, D. K. Das and M. Lal, J. Heterocyclic. Chem. 49, 1362-1369, 2012.
  62. Synthesis of important ß-functionalized 5-methyl-1H-pyrazol-3-ol derivatives in the presence of alumina catalyst in aqueous medium
    Md. R. Rohman, H. Mecadon, A. T. Khan and B. Myrboh,* Tetrahedron Lett. 53, 5261-5264, 2012.
  63. Regioselective monobromination of (E)-1-(2?-hydroxy-4?,6?-dimethoxyphenyl)-3-aryl-2-propen-1-ones using bromodimethylsulfonium bromide and synthesis of 8-bromoflavones and 7-bromoaurones
    A. T. Khan,* A. Choudhury, S. Ali and M. M. Khan, Tetrahedron Lett. 53, 4852-4557, 2012.
  64. Synthesis of tetra-substituted pyrroles, a potential phosphodiesterase 4B inhibitor, through nickel(II) chloride hexahydrate catalyzed one-pot four-component reaction
    A.T. Khan,* M. Lal, P. R. Bagdi, R. Sidick Basha, P. Saravanan and S. Patra, Tetrahedron Lett. 53, 4145-4150, 2012.
  65. Formation of unexpected a-amino amidine through three-component ‘UGI condensation reaction’
    A. T. Khan,* R. Sidick Basha, M. Lal and M. H. Mir, RSC Adv., 2, 5506-5509, 2012.
  66. One-pot four-component domino reaction for the synthesis of substituted dihydro-2-oxypyrrole catalyzed by molecular iodine
    A. T. Khan,* A. Ghosh and M. M. Khan, Tetrahedron Lett. 53, 2622-2226, 2012.
  67. Michael initiated ring closure (MIRC) reaction on in situ generated benzylidenecyclohexane-1,3-diones for the construction of chromeno[3,4-b] quinoline derivatives
    A. T. Khan* and D. K. Das, Tetrahedron Lett. 53, 2345-2351, 2012.
  68. Bromodimethylsulfonium bromide (BDMS) catalyzed synthesis of imidazo[1,2-a]pyridine derivatives and their fluorescence properties
    A. T. Khan,* R. Sidick Basha and M. Lal, Tetrahedron Lett. 53, 2211-2217, 2012.
  69. Ferric sulfate: an efficient heterogeneous catalyst for the synthesis of tetrahydroquinoline derivatives using Povarov reaction
    A. T. Khan,* D. K. Das and M. M. Khan, Tetrahedron Lett. 52, 4539-4542, 2011.
  70. Sequential three-component reactions: synthesis, regioselectivity and application of functionalized dihydropyridines (DHPs) for the creation of fused naphthyridines
    A. T. Khan* and M. M. Khan, Tetrahedron Lett. 52, 3455-3459, 2011.
  71. Tetrabutylammonium tribromide (TBATB): a mild and efficient catalyst for O-isopropylidenation of carbohydrates
    A. T. Khan,* M. M. Khan and A. Adhikary, Carbohydr. Res. 346, 673-677, 2011.
  72. VO(acac)2/H2O2/NaI: a mild and efficient combination for the cleavage of dithioacetal derivatives of sugars
    A. T. Khan,* S. Ali, R. Sidick Basha, M. M. Khan and M. Lal, Carbohydr. Res. 346, 2629-2632, 2011.
  73. New three-component condensation reaction: synthesis of 1-[(alkylthio)(phenyl)methyl]-naphthalene-2-ol catalyzed by bromodimethylsulfonium bromide (BDMS)
    A. T. Khan,* S. Ali, A. A. Dar and M. Lal, Tetrahedron Lett. 52, 5157-5160, 2011.
  74. One-pot three-component reaction for the synthesis of pyran annulated heterocyclic compounds using DMAP as a catalyst
    A. T. Khan,* M. Lal, S. Ali and M. M. Khan, Tetrahedron Lett. 52, 5327-5332, 2011.
  75. Bromodimethylsulfonium bromide (BDMS) mediated dithioacetalization of carbohydrates under solvent free conditions
    A. T. Khan* and M. M. Khan, Carbohydr. Res. 345, 2139-2145, 2010.
  76. Iodine catalyzed one-pot five component reactions for direct synthesis of densely functionalized piperidines
    A. T. Khan,* M. M. Khan and K. K. R. Bannuru, Tetrahedron, 66, 7762-7789, 2010.
  77. A simple and convenient synthetic protocol for O-isopropylidenation of sugars using bromodimethylsulfonium bromide (BDMS) as a catalyst
    A. T. Khan* and M. M. Khan, Carbohydr. Res. 345, 154-159, 2010.
  78. Synthesis of highly functionalized piperidines by one-pot multicomponent reaction using tetrabutylammonium bromide (TBATB)
    A. T. Khan,* M. Lal and M. M. Khan, Tetrahedron Lett. 51, 4419-4424, 2010.
  79. Recent advances in the application of bromodimethylsulfonium bromide in organic synthesis
    L. H. Choudhury, T. Parvin and A. T. Khan,* Tetrahedron, 65, 9513-9526, 2009.
  80. Structural analysis and properties of dextran produced by Leuconostoc mesenteroides NRRL B-640
    R. K. Purama, P. Goswami, A. T. Khan* and A. Goyal, Carbohydrate Polymers, 76, 30-35, 2009.
  81. A simple and convenient one-pot synthesis of benzimidazole derivatives using cobalt(II) chloride hexahydrate as catalyst
    A. T. Khan,* T. Parvin and L. H. Choudhury, Synth. Commun. 39, 2339-2346, 2009.
  82. Effects of substituents in the ß-position of 1,3-dicarbonyl compounds in bromodimethylsulfonium bromide catalyzed multicomponent reactions: A facile access to functionalized piperidines
    A. T. Khan,* T. Parvin and L. H. Choudhury, J. Org. Chem. 73, 8398-8402, 2008.
  83. An attempt towards coordination supramolecularity from Mn(II), Ni(II) and Cd(II) with a new hexadentate[N4O2] symmetrical Schiff base ligand: syntheses, crystal structures, electrical conductivity and optical properties
    S. Sarkar, S. Biswas, M. Liao, T. Kar, Y. Aydogdu, F. Dagdelen, G. Mostafa, A. P. Chattopadhyay, G. P. A. Yap, R. Xie, A. T. Khan and K. Dey,* Polyhedron, 27, 3359-3370, 2008.
  84. Bromodimethylsulfonium bromide (BDMS) catalyzed three-component Mannich-type reactions
    A. T. Khan,* T. Parvin and L. H. Choudhury, Eur. J. Org. Chem. 834, 2008.
  85. Selective and effective oxone catalysed a-iodination of ketones and 1,3-dicarbonyl compounds in the solid state
    P. Goswami, S. Ali, M. M. Khan and A. T. Khan,* ARKIVOC, 82-89, 2007.
  86. Iron(III) chloride-catalyzed convenient one pot synthesis of ß-acetamido carbonyl compound
    A. T. Khan,* T. Parvin and L. H. Choudhury, Tetrahedron, 63, 5593-5601, 2007.
  87. Bromodimethylsulfonium bromide mediated Michael addition of amines to electron deficient alkenes
    A. T. Khan,* T. Parvin, S. Gazi and L. H. Choudhury, Tetrahedron Lett. 48, 3805-3808, 2007.
  88. A simple synthetic protocol for oxidation of alkyl-arenes into ketones using a combination of HBr-H2O2
    A. T. Khan,* T. Parvin, L. H. Choudhury and S. Ghosh, Tetrahedron Lett. 48, 2271-2274, 2007.
  89. A mild and regioselective method for a-bromination of ß-keto esters and 1,3-diketones using bromodimethylsulfonium bromide (BDMS)
    A. T. Khan,* M. A. Ali , P. Goswami and L. H. Choudhury, J. Org. Chem. 67, 8961-8963, 2006.
  90. CeCl3.7H2O: an efficient and reusable catalyst for the preparation of ß-acetamido carbonyl compounds by multi-component reactions (MCRS)
    A. T. Khan,* L. H. Choudhury, T. Parvin and M. A. Ali, Tetrahedron Lett. 47, 8137-8141, 2006.
  91. Silica-Supported perchloric acid (HCIO4-SiO2): A versatile catalyst for the tetrahydropyranylation, oxathioacetalization and thioacetalization.
    A. T. Khan,* T. Parvin and L. H. Choudhury, Synthesis, 2497-2502, 2006.
  92. Silica supported perchloric acid (HCIO4-SiO2): A highly efficient and reusable catalyst for geminal diacylation of aldehydes under solvent-free conditions
    A. T. Khan,* L.H. Choudhury and S. Ghosh, J. Mol. Cat. A: Chem. 255, 230-235, 2006.
  93. A mild and environmentally acceptable synthetic protocol for chemoselective a-bromination of ß-keto esters and 1,3-diketones
    A. T. Khan,* P. Goswami and L. H. Choudhury, Tetrahedron Lett. 47, 2751-2754, 2006.
  94. Perchloric acid impregnated on silics gel (HCIO4-SiO2): A versatile catalyst for Michael addition of thiols to the electron deficient alkenes
    A. T. Khan,* L. H. Choudhury and S. Ghosh, Eur. J. Org. Chem. 2226-2231, 2006.
  95. A highly efficient synthetic protocol for tetrahydropyranylation/depyranylation of alcohols and phenols
    A. T. Khan,* S. Ghosh and L. H. Choudhury, Eur. J. Org. Chem. 4891-4896, 2005.
  96. Bromodimethylsulfonium bromide: A useful reagent for acylation of alcohols, phenols, amines, thiols, thiophenols and 1,1-diacylation of aldehydes under solvent free conditions
    A. T. Khan,* S. Islam, A. Majee, T. Chattopadhyay and S. Ghosh, J. Mol. Cat. A: Chem. 239, 158-165, 2005.
  97. Acetonyltriphenylphosphonium bromide (ATPB): A versatile reagent for the acylation of alcohols, phenols, thiols and amines and for 1,1-diacylation of aldehydes under solvent free conditions
    A. T. Khan,* L. H. Choudhury and S. Ghosh, Eur. J. Org. Chem. 2782-2787, 2005.
  98. Tetrahydropyranylation and depyranylation of alcohols catalyzed by aqueous zinc tetrafluoroborate
    S. Islam, A. Majee and A. T. Khan,* Synth. Commun. 35, 1789-1793, 2005.
  99. A highly efficient and environmentally benign synthesis of 6,8-dibromoflavones, 8-bromoflavones, 5,7-bromoaurones and 7-bromoaurones
    A. T. Khan* and P. Goswami, Tetrahedron Lett. 46, 4937-4940, 2005.
  100. A simple and practical synthetic protocol for thioacetalization of carbonyl compounds
    A. T. Khan* and E. Mondal, Indian J. Chem. Sec B. 44B, 844-850, 2005.
  101. A highly efficient and catalytic synthetic protocol for oxathioacetalization of the carbonyl compounds
    A. T. Khan,* P. R. Sahu and A. Majee, J. Mol. Cat. A: Chem. 226, 207-212, 2005.
  102. A catalytic amount of nickel(II) chloride hexahydrate and 1,2-ethanedithiol is a good combination for the cleavage of tetrahydropyranyl (THP) and tert-butyldimethylsilyl (TBS) ethers
    A. T. Khan,* S. Islam, L. H. Choudhury and S. Ghosh, Tetrahedron Lett. 45, 9617-9621, 2004.
  103. Selective thioacetalization of aldehydes catalyzed by aqueous zinc tetrafluoroborate
    S. Islam, A. Majee, T. Mondal and A. T. Khan,* Synth. Commun. 34, 2911-2916, 2004.
  104. Cupric sulfate pentahydrate (CuSO4.5H2O): A mild and efficient catalyst for tetrahydropyranylation/depyranylation of alcohols and phenols.
    A. T. Khan,* L. H. Choudhury and S. Ghosh, Tetrahedron Lett. 45, 7891-7894, 2004.
  105. A simple and useful synthetic protocol for selective deprotection of tert-butyldimethylsilyl (TBS) ethers
    A. T. Khan,* S. Ghosh and M. L. H. Choudhury, Eur. J. Org. Chem. 2198-2204, 2004.
  106. A simple and practical synthetic protocol for acetalization, thioacetalization and transthioacetalization of carbonyl compounds under solvent-free conditions
    A. T. Khan,* E. Mondal, S. Ghosh and S. Islam, Eur. J. Org. Chem. 2002-2009, 2004.
  107. A highly efficient and chemoselective synthetic protocol for tetrahydropyranylation/depyranylation of alcohols and phenols
    A. T. Khan,* E. Mondal, B. M. Borah and S. Ghosh, Eur. J. Org. Chem. 4113-4117, 2003.
  108. A highly efficient and useful synthetic protocol for the cleavage of tert-butyldimethylsilyl (TBS) ethers using a catalytic amount of acetyl chloride in dry methanol
    A. T. Khan* and E. Mondal, Synlett 694-698, 2003.
  109. A highly efficient procedure for regeneration of carbonyl groups from their corresponding oxathioacetals and dithioacetals using sodium nitrite and acetyl chloride in dichloromethane
    A. T. Khan,* E. Mondal and P. R. Sahu, Synlett 377-381, 2003.
  110. Nickel(II) chloride as an efficient and useful catalyst for chemoselective thioacetalization of aldehydes
    A. T. Khan,* E. Mondal, P. R. Sahu and S. Islam, Tetrahedron Lett. 44, 919-922, 2003.
  111. A useful and catalytic method for protection of carbonyl compounds into the corresponding 1,3-oxathiolanes and deprotection to the parent carbonyl compounds
    E. Mondal, P. R. Sahu and A. T. Khan,* Synlett 463-467, 2002.
  112. A mild and environmentally benign synthetic protocol for catalytic hydrolysis of thioglycosides
    P. M. Bujar Barua, P. R. Sahu, E. Mondal, G. Bose and A. T. Khan,* Synlett 81-84, 2002.
  113. A useful and convenient synthetic procedure for hydrolysis of thioglcosides
    E. Mondal, P. M. Bujar Barua, G. Bose and A. T. Khan,* Chem. Lett. 210-211, 2002.
  114. An exceptionally simple and catalytic method for regeneration of carbonyl functionality from the corresponding 1,3-oxathiolanes
    E. Mondal, P. R. Sahu, G. Bose and A. T. Khan,* J. Chem. Soc., Perkin Trans. I, 1026-1028, 2002.
  115. A useful and convenient synthetic protocol for interconversion of carbonyl compounds to the corresponding 1,3-oxathiolanes and vice-versa employing organic ammonium tribromide (OATB)
    E. Mondal, P. R. Sahu, G. Bose and A. T. Khan,* Tetrahedron Lett. 43, 2843-2846, 2002.
  116. A useful and environmentally benign synthetic protocol for dethiolization by employing vanadium pentoxide catalysed oxidation of ammonium bromide by hydrogen peroxide
    E. Mondal, G. Bose, P. R. Sahu and A. T. Khan,* Chem. Lett. 1158-1159, 2001.
  117. Oxidative cleavage of diethyldithioacetals by ammonium bromide promoted by (NH4)6Mo7O24.4H2O-H2O2 :A useful synthetic protocol for regeneration of carbonyl compounds
    A. T. Khan,* J. Boruwa, E. Mondal and G. Bose, Indian J. Chem. 40B, 1039-1042, 2001.
  118. An expedient and efficient method for the cleavage of dithioacetals to the corresponding carbonyl compounds using organic ammonium tribromide (OATB)
    E. Mondal, G. Bose and A. T. Khan,* Synlett 785-786, 2001.
  119. An environmentally benign synthesis of aurones and flavones from 2’-acetoxychalcones using n-tetrabutyl-ammonium tribromide
    G. Bose, A. T. Khan* and M. J. Bordoloi, Tetrahedron Lett. 42, 8907-8909, 2001.
  120. A convenient and useful method of preparation of a-bromo enones from the corresponding enones using using organic ammonium tribromide
    G. Bose, P. M. Bujar Barua, M. K. Chaudhuri, D. Kalita and A. T. Khan,* Chem. Lett. 290-291, 2001.
  121. Regioselective bromination of organic substrates by tetrabutylammonium bromide promoted by V2O5-H2O2 : An environmentally favorable synthetic protocol
    U. Bora, G. Bose, M. K. Chaudhuri,* S. S. Dhar, R. Gopinath, A. T. Khan* and B. K. Patel,* Org. Lett. 2, 247-249, 2000.
  122. Total synthesis of R-(+)-Patulolide A and R-(-)-Patulolide B : The macrolides isolated from penicillium urticae Mutant
    D. Kalita, A. T. Khan, N. C. Barua* and G. Bez, Tetrahedron, 55, 5177-5184, 1999.
  123. An environmentally benign synthesis of organic ammonium tribromides (OATB) and bromination of selected organic substrates by tetrabutylammonium tribromide (TBATB)
    M. K. Chaudhuri,* A. T. Khan, B. K. Patel, D. Dey W. Kharmawophlang, T.R. Lakshmiprabha and G.C. Mandal, Tetrahedron Lett. 39, 8163-8166, 1998.
  124. A short enantioselective formal synthesis of (+)-(S)-4,4-(ethylenedioxy)-7-hydroxyoct-2-enoic acid: the penultimate precursor to (-)-(R,R)-pyranophorin
    D. Kalita,* A. T. Khan, A. K. Saikia, G. Bez and N. C. Barua, Synthesis 975-976, 1998(7).
  125. Stereocontrolled synthesis of highly functionalized 2,4-dioxahydrindans via debenzylating tetrahydrofuran ring formation
    A. T. Khan, H. Dietrich and R. R Schmidt,* Synlett 131-134, 1996.
  126. A method for the synthesis of C-(2-deoxy-ß-glycosyl) arenes
    A. T. Khan, W. Ahmed and R. R. Schmidt,* Carbohydr. Res. 280, 277-286, 1996.
  127. Synthesis of C-disaccharides an unusual ring closure reaction
    A. T. Khan, P. Sharma and R. R. Schmidt,* J. Carbohydr. Chem. 14, 1353-1367, 1995.
  128. An expedient and efficient synthesis of naturally occurring hydroxy substituted anthraquinones
    A. T. Khan, B. Blessing and R. R. Schmidt,* Synthesis 255-257, 1994.
  129. Facile alkylative cyclisation: regioselectivity in the synthesis of 2-methyl-4H-thieno[2,3-b][1]benzo-thiopyran-4-ones and thiopyrano[2,3-b][1]benzothiopyran-5(4H)-ones
    K. C. Majumdar,* S. Saha and A. T. Khan, Indian J. Chem., 33B, 216-222, 1994.
  130. Studies in sigmatropic rearrangement: rearrangement of 4-(4’-alkyl substituted aryloxy but 2-ynyloxy)[1] benzopyran-2-ones
    K. C. Majumdar,* D. P., G. H. Jana and A. T. Khan, Indian J. Chem., 33B, 120-124, 1994.
  131. Studies on cyclisation of 3-[2-cyclohexenyl]-4-hydroxy [1] benzopyran-2(H)-one
    K. C. Majumdar,* A. T. Khan, A. K. Gupta, A. K. Kundu and P. K. Choudhury, Indian J. Chem., 31B, 667-672, 1992.
  132. Regioselective synthesis of 4-(aryloxymethyl) thiopyrano[2,3-b][1]benziothiopyran-5(2H)-one
    K. C. Majumdar,* A. T. Khan and S. Saha, Synth. Commun. 22, 901-912, 1992.
  133. Facile regioselective alkylative cyclisation: synthesis of 2-methyl-4H-thieno [2,3-b][1] benzothiopyran-4-one and thiopyrano [2,3-b][1] benzoyhiopyran-5(4H)-one
    K. C. Majumdar,* A. T. Khan and S. Saha, Synlett 595-596, 1991.
  134. Proton and carbon-13 NMR spectra of some 3,4-fused pyranocoumarins and furocoumarins
    A. Patra, S. K. Panda, K. C. Majumdar,* A. T. Khan and S. Saha, Magn. Reson. Chem. 28, 631-635, 1991.
  135. Regioselective alkylation of 4-hydroxy-1-benzothiopyran-2(H)-thione
    K. C. Majumdar,* A. T. Khan and S. Saha, Indian J. Chem., 30B, 643-645, 1991.
  136. Studies in [3,4] sigmatropic rearrangements: a novel synthesis of 9-allenyl-10-substituted anthracenes from 10,10-distributed-9-anthrols
    K. C. Majumdar,* A. T. Khan and S. K. Chattopadhyay, J. Chem. Soc., Perkin Trans. I, 2219-2223, 1990.
  137. Phase transfer catalyzed alkylation of 4-hydroxycoumarin- Synthesis of a,a-disubstituted-o-hydroxyacetophe-nones
    K. C. Majumdar,* A. T. Khan and S. K. Chattopadhyay, Indian J. Chem., 29B, 483-485, 1990.
  138. Studies on the cyclisation of 4-[2’-cyclohexenyl]-3-hydroxy [1] benzopyran-2-one
    K. C. Majumdar,* A. T. Khan, A. K. Gupta and K. Dey, Synth. Commun. 20, 1249-1263, 1990.
  139. One-pot synthesis of 2-aryloxymethyl-1-cyanomethyl-5,6-dihydro-4H-pyrrolo[3,2,1-ij]quinoline via rearrangement of the N-oxide from 1-aryloxy-4-tetrahydro-1-quinolyloxybut-2-yne
    K. C. Majumdar,* S. K. Chattopadhyay and A. T. Khan, J. Chem. Soc., Perkin Trans. I, 1285-1288, 1989.
  140. Facile regioselective synthesis of pyrano [3,2-c][1] benzothiapyran-5(2H)-one and 2-methyl furo[3,2-c][1]benzothiapyran-4-one
    K. C. Majumdar,* P. K. Choudhury and A. T. Khan, Synth. Commun. 19, 3249-3257, 1989.
  141. Facile regioselective synthesis of 2-methyl furo[3,2-c][1] benzopyran-4-one and 2-methyl furo[2.3-c][1]benzopyran-4-one
    K. C. Majumdar,* A. T. Khan and D. P. Das, Synth. Commun. 19, 917-930, 1989.
  142. Synthesis of 10-alkyl-9-allenylanthracenes involving [3,4] sigmatropic rearrangement
    K. C. Majumdar, A. T. Khan and S. K. Chattopadhyay, J. Chem. Soc., Chem. Commum. 654-655, 1989.
  143. Phase transfer catalyzed alkylation of 3-hydroxycoumarin
    K. C. Majumdar,* A. T. Khan and S. K. Chattopadhyay, Heterocycles, 29, 1573-1576, 1989.
  144. Regioselective synthesis of 4-aryloxymethyl-2H-pyrano[3,2-c]benzopyran-5H-one from 1-aryloxy-4-[4’-coumarinyloxy]but-2-yne
    K. C. Majumdar,* D. P. Das and A. T. Khan, Synth. Commun. 18, 2027-2036, 1988.
  145. Regioselective synthesis of 2H-pyrano [3,2-c] benzopyran-5H-one and 3H-pyrano[2,3-c]benzopyran-5H-one
    K. C. Majumdar,* A. T. Khan and R. N. De, Synth. Commun. 18, 1589-1595, 1988.
  146. Studies of [3,3] sigmatropic rearrangements: rearrangement of 3-(4-p-tolyloxybut-2-ynyloxy)[1] benzopyran-2-one
    K. C. Majumdar,* R. N. De, A. T. Khan, S. K. Chattopadhyay, K. Dey And A. Patra, J. Chem. Soc., Chem. Commun. 777-779, 1988.
  147. Phase-transfer catalyzed alkylation of anthrone and 10-propargylanthrone
    K. C. Majmdar,* S. K. Chattopadhyay and A. T. Khan, Synthesis 552-553, 1988.

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