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Papers by rudraksha bhattacharya
Tetrahedron Letters, 2010
Accepted Manuscript Antimony trichloride catalyzed three-component reaction of urea, aldehydes an... more Accepted Manuscript Antimony trichloride catalyzed three-component reaction of urea, aldehydes and cyclic enol ethers: a novel route to 4-arylhexahydrofuro[2,3-d]pyrimi din-2(3H)-ones RN Bhattacharya, Pradip Kundu, Gourhari Maiti PII: S0040-4039(10)01853-8 DOI: 10.1016/j. ...
ChemInform, 2012
Epoxides are valuable intermediates in organic synthesis as they serve as illogical electrophile ... more Epoxides are valuable intermediates in organic synthesis as they serve as illogical electrophile and their nucleophilic cleavage leads to 1,2 difunctionalized systems and also because it usually leads to transstereochemistry 1 . Conversion of epoxides to halohydrins had been studied extensively with a variety of reagents like magnesium halides, SnCl2.2H2O, TMSCl, alkylammonium halides, thionyl chloride, zirconyl chloride, etc 2 . Chlorohydrins and other halohydrins gain importance from the fact that they are intermediates in the synthesis of a vast range of biologically active natural and synthetic products, unnatural amino acids and chiral auxiliaries for asymmetric synthesis 3 . They also find application in the synthesis of homochiral β-blockers. Because of these synthetic utilities, a newer, cheap and accessible method for transformation of epoxides to halohydrins is still in demand and a field of active research interest. In continuation of the work on exploring the scope of an...
Tetrahedron Letters, Nov 21, 2012
Tetrahedron Letters, 2011
Substituted phenylacetylenes react with various o-hydroxy aromatic aldehydes under dual catalysis... more Substituted phenylacetylenes react with various o-hydroxy aromatic aldehydes under dual catalysis of piperidine and FeCl3 in refluxing toluene to yield flavones in good to excellent yield. Atmospheric oxygen acts as stoichiometric oxidant in the process. Some of these ...
Synthetic Communications, 2010
2-Aryl-2,3-dihydroquinolin-4-(1H)-ones bearing substituents on the aromatic rings exhibit various... more 2-Aryl-2,3-dihydroquinolin-4-(1H)-ones bearing substituents on the aromatic rings exhibit various pharmacological activities. [ 1 1. Kalinin , VN ; Shostakovsky , MV ; Ponomaryov , AB A new route to 2-aryl-4-quinolones via palladium-catalyzed carbonylative coupling of o-iodoanilines ...
Tetrahedron Letters, 2012
Tetrahedron Letters, 2010
Accepted Manuscript Antimony trichloride catalyzed three-component reaction of urea, aldehydes an... more Accepted Manuscript Antimony trichloride catalyzed three-component reaction of urea, aldehydes and cyclic enol ethers: a novel route to 4-arylhexahydrofuro[2,3-d]pyrimi din-2(3H)-ones RN Bhattacharya, Pradip Kundu, Gourhari Maiti PII: S0040-4039(10)01853-8 DOI: 10.1016/j. ...
ChemInform, 2012
Epoxides are valuable intermediates in organic synthesis as they serve as illogical electrophile ... more Epoxides are valuable intermediates in organic synthesis as they serve as illogical electrophile and their nucleophilic cleavage leads to 1,2 difunctionalized systems and also because it usually leads to transstereochemistry 1 . Conversion of epoxides to halohydrins had been studied extensively with a variety of reagents like magnesium halides, SnCl2.2H2O, TMSCl, alkylammonium halides, thionyl chloride, zirconyl chloride, etc 2 . Chlorohydrins and other halohydrins gain importance from the fact that they are intermediates in the synthesis of a vast range of biologically active natural and synthetic products, unnatural amino acids and chiral auxiliaries for asymmetric synthesis 3 . They also find application in the synthesis of homochiral β-blockers. Because of these synthetic utilities, a newer, cheap and accessible method for transformation of epoxides to halohydrins is still in demand and a field of active research interest. In continuation of the work on exploring the scope of an...
Tetrahedron Letters, Nov 21, 2012
Tetrahedron Letters, 2011
Substituted phenylacetylenes react with various o-hydroxy aromatic aldehydes under dual catalysis... more Substituted phenylacetylenes react with various o-hydroxy aromatic aldehydes under dual catalysis of piperidine and FeCl3 in refluxing toluene to yield flavones in good to excellent yield. Atmospheric oxygen acts as stoichiometric oxidant in the process. Some of these ...
Synthetic Communications, 2010
2-Aryl-2,3-dihydroquinolin-4-(1H)-ones bearing substituents on the aromatic rings exhibit various... more 2-Aryl-2,3-dihydroquinolin-4-(1H)-ones bearing substituents on the aromatic rings exhibit various pharmacological activities. [ 1 1. Kalinin , VN ; Shostakovsky , MV ; Ponomaryov , AB A new route to 2-aryl-4-quinolones via palladium-catalyzed carbonylative coupling of o-iodoanilines ...
Tetrahedron Letters, 2012