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Asymmetric synthesis of the dopamine D1 agonist, dihydrexidne from D-serine
Malhotra, R.; Ghosh, A.; Ghosh, R.; Chakrabarti, S.; Dutta, S.; Dey, T. K.; Roy, S.; Basu,* S.; Hajra,* S. Tetrahedron: Asymm. 2011, 22, 1522.
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Catalytic Enantioselective Aziridoarylation of Aryl Cinnamyl Ethers toward Synthesis of trans-3-Amino-4-arylchromans
Hajra, S.; Sinha, D. J. Org. Chem. 2011, 76, 7334.
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Asymmetric synthesis of the dopamine D1 agonist, dihydrexidne
Hajra, S.; Bar, S. Tetrahedron: Asymm. 2011, 22, 775.
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Catalytic enantioselective synthesis of A-86929, a dopamine D1 Agonist
Hajra, S.; Bar, S. Chem. Commun. 2011, 47, 3981-3982.
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Asymmetric epoxidation of cinnamic acid derivatives by in situ generated dioxiranes of chloroacetones: Scope and limitations.
Hajra, S.; Bhowmick, M. Tetrahedron: Asymm. 2010, 21, 2223.
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Asymmetric Syntheses of (–)-Enterolactone and (7¢R)-7¢-Hydroxyenterolactone via Organo-catalyzed Aldol Reaction.
Hajra, S.; Giri, A. K.; Hazra, S. J. Org. Chem. 2009, 74, 7978.
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A Catalytic and Enantioselective Synthesis of trans-2- Amino-1-aryltetralins.
Hajra, S.; Maji, B.; Mal, D. Adv. Synth. Catal. 2009, 351, 859.
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Organocatalytic and Enantioselective Synthesis of b-(Hydroxyalkyl) -g-Butyrolactones.
Hajra, S.; Giri, A. K. J. Org. Chem. 2008, 73, 3935.
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Stereoselective One-Pot Synthesis of Oxazolines.
Hajra, S.; Bar, S.; Sinha, D.; Maji, B. J. Org. Chem. 2008, 73, 4320.
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Concise Syntheses of (+)- and (-)-Methylenolactocins and Phaseolinic Acids.
Hajra, S.; Giri, A. K.; Karmakar, A. and Hazra, S. Tetrahedran Lett. 2008, 49,3625.
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A One-Pot Stereoselective Synthesis of trans-1-Amino-2-Aryltetralins from 2-Arylethyl Styrenes.
Hajra, S.; Maji, B.; Sinha, D.; Bar, S. Tetrahedran Lett. 2008, 49,4057.
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Design and Synthesis of Chiral N-Chloro-imidodicarbonates: Application to Asymmetric Chlorination of Silylenol Ethers.
Hajra, S. Bhowmick, M.; Maji, B. and Sinha, D. J. Org. Chem. 2007, 72, 4872.
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Samarium triflate catalyzed and halogen-promoted Friedel-Crafts Alkylation with Alkenes.
Hajra, S, Maji, B. and Bar, S. Org. Lett. 2007, 9, 2783.
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Asymmetric aldol reactions under normal and inverse addition modes of reagents.
Hajra, S.; Giri, A. K.; Karmakar, A.; Khatua, S. Chem. Comm. 2007, 2408.
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Metal Triflates Catalyzed Reactions of Alkenes, NBS, Nitriles and TMSN3: Synthesis of 1,5-Disubsituted Tetrazoles.
Hajra, S.; Sinha, D. and Bhowmick, M. J. Org. Chem. 2007, 72, 1852.
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Highly Regio- and Stereoselective Asymmetric Bromoazidation of Chiral a,b-Unsaturated Carboxylic Acid Derivatives: Scope and Limitations.
Hajra, S.; Bhowmick, M.; Sinha, D. J. Org. Chem. 2006, 71, 9237.
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Metal triflate catalyzed highly regio- and stereoselective 1,2-bromoazidation of alkenes using NBS and TMSN3 as the bromine and azide sources
Hajra, S.; Sinha, D.; Bhowmick, M. Tetrahedran Lett. 2006, 47,7017.
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Stereoselective synthesis of (-)-chloramphenicol and (-)-thiomphenicol.
Hajra, S.; Karmakar, A.; Maji, T. and Medda, A. Tetrahedron 2006, 62, 8959.
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Silver (I)-promoted asymmetric O-methylhalohydrin reaction of chiral α,β-unsaturated carboxylic acid derivatives: Enantioselective synthesis of N-protected syn-b-methoxy-a-amino acids.
Hajra, S.; Karmakar, A.; and Bhowmick, M. Tetrahedron Asymm. 2006, 17, 210.
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Lewis Acid Catalyzed Intramolecular Halo-Arylation of Tethered alkenes using NXS as a Halonium Source: A General Method for the Synthesis of Chromanons, Chromans, Quinolones, Tetrahydroquinolines and Tetralins.
Hajra, S.; Maji, B. and Karmakar, A. Tetrahedran Lett. 2005, 46,8599.
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Lewis acid catalyzed asymmetric halohydrin reactions of chiral a,b-unsaturated carboxylic acid derivatives with N-halosuccinimide (NXS) as the halogen source.
Hajra, S.; Bhowmick, M. and Karmakar, A. Tetrahedron Lett. 2005, 46, 3073.
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Silver (I)-promoted asymmetric halohydrin reaction of chiral N-enoyl-2-oxazolidinones: Scope and limitations.
Hajra, S.; Karmakar, A.; and Bhowmick, M. Tetrahedron 2005, 61, 2279.
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Asymmetric O-methylhalohydrin reaction of chiral N-enoyl-2-oxazolidinones: Synthesis of N-protected syn-b-methoxyphenylalanine, an unusual amino acid component of cyclomarins.
Hajra, S.; Karmakar, A. Tetrahedron Lett. 2004, 45, 3185.
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Free-Radical-Mediated Conjugate Additions. Enantioselective Synthesis of Butyrolactone Natural Products: (-)-Enterolactone, (-)-Arctigenin, (-)-Isoarctigenin, (-)-Nephrosteranic Acid, and (-)-RoccellaricAcid.
Sibi, M. P.; Liu, P.; Ji, J.; Hajra, S. and Chen, J. J. Org. Chem. 2002, 67, 1738.
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A Highly Chemoselective Oxidation of Alcohols to Carbonyl Products with Iodosobenzene Diacetate Mediated by Chromium(III)(salen) Complexes: Synthetic and Mechanistic Aspects.
Adam, W.; Hajra, S.; Herderich, M. and Saha-Möller, C. R. Org. Lett. 2000, 2, 2773.
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Synthesis of Silicon-Containing Alanines.
Sibi, M. P.; Harris, B.; Shay, J. J. and Hajra, S. Tetrahedron 1998, 54, 7221.
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The Intermolecular b-Coupling of Cyclic Enones with Activated Alkenes and Alkynes: Unexpectedb-Alkoxy Elimination from a 4-Alkoxy-2-Alkyl-1-Hydroxy-Cyclopentyl Radical.
Pandey, G.; Ghorai, M. K. and Hajra, S. Tetrahedron Lett. 1998, 39, 8341.
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A New Strategy for the Construction of Carbo- and Oxycycles by Intramolecular Reductive Coupling of a,b-Unsaturated Esters.
Pandey, G.; Ghorai M. K. and Hajra S. Tetrahedron Lett. 1998, 39, 1831.
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Visible-Light Initied Photosensitized Electron Transfer (PET) Cyclization of Aldehydes and Ketones to Tethered a,b-Unsaturated Esters: Stereoselective Synthesis of Optically Pure C- Furanoside.
Pandey, G.; Hajra, S.; Ghorai, M. K. and Ravi Kumar, K. J. Org. Chem. 1997, 62, 5966.
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Designing of a Photosystem to Harvest Visible-Light to Electrons by Sequential Electron Transfer Processes: Reversing the Reactivity Profiles of a,b-Unsaturated Ketones as Carbon Radical Precursor by One Electron Reductive b-Activation.
Pandey, G.; Hajra, S.; Ghorai, M. K. and Ravi Kumar, K. J. Am. Chem. Soc. 1997, 119, 8777.
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Designing of a Photosystem to Harvest Visible-Light to Electrons: Photosensitized one Electron Redox Reactions in Organic Synthesis.
Pandey, G.; Hajra, S. and Ghorai, M. K. Pure & Appl. Chem. 1996, 68, 653.
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Visible-Light Initiated Photosensitized Electron Transfer (PET) Reductive b-Activation of a,b-Unsaturated Ketones for Radical Cyclization: A New Concept in Promoting Radical Reactions.
Pandey, G.; Hajra, S. and Ghorai, M. K. Tetrahedron Lett. 1994, 35, 7837.
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A Novel Photosystem for Harvesting Visible-Light to Drive Photoinduced Electron Transfer (PET) Reductions: b-Activation of a,b-Unsaturated Ketones for Radical Cyclization.
Pandey, G. and Hajra, S. Angew. Chem. Int. Ed. (Engl.), 1994, 33, 1169.
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