U. T. Bhalerao

Photoinduced set generation of α-amineradicals : A practical method for the synthesis of pyrrolidines and piperidines

Abstract Selective desilylation to generate α-amineradicals from α-alkyl silylamine radical cation and their intramolecular cyclisation is reported.

Novel Method for Preparation of Symmetric Disulfides from Thiols Using Enzyme Catalysis

Abstract Mild and efficient method for preparation of variety of symmetric disulfides from oxidation of thiols using horseradish peroxidase or mushroom tyrosinase as catalyst is described. IICT Communication No: 3654

Laccase enzyme catalysed efficient synthesis of 3-Substituted-1,2,4-triazoto(4,3-b)(4,1,2)benzothiadiazine-8-ones

Abstract Full details of an efficient one step synthesis of 3-substituted(4,3-b)(4,1,2)benzothiadiazine-8-ones (4a-4h) by Laccase enzyme (E.C.1.10.3.2) mediated reaction of various 5-substituted-4-amino-3-mercapto-1,2,4-triazoles (1a-1h) and hydroquinone (2) is described.

Copper(II)chloride Catalyzed Tetrahydropyranylation of Alcohols

Abstract A simple and efficient methodology for the tetrahydropyranylation of alcohols using catalytic amount of copper(II)chloride in dichloromethane is described. The yields obtained are good to excellent.

Mushroom tyrosinase catalysed synthesis of coumestans, bebzofuranderivatives and related heterocyclic compounds

Abstract Full details of an improved synthesis of coumestan derivatives and their structural analogues, viz., wedelolactone, 11-hydroxy aureol, 11-hydroxy coumestrol along with benzofuran derivatives and related heterocyclic systems are reported by coupling of in situ generated o-quinones from catechols catalysed by mushroom tyrosinase with various reactants.

Mushroom tyrosinase catalysed coupling of hindered phenols : A novel approach for the synthesis of diphenoquinones and bisphenols

An efficient oxidative carbon-carbon coupling of hindered phenols leading to diphenoquinones and bisphenols by mushroom tyrosinase is reported.

NOVEL HORSERADISH PEROXIDASE CATALYSED ENANTIOSELECTIVE OXIDATION OF 2-NAPHTHOLS TO 1,1'-BINAPHTHYL-2,2'-DIOLS

Abstract Enantioselective oxidation of 2-naphthols to 1,1′-binaphthyl-2,2′-diols catalysed by horseradish peroxidase is described.

Manganese dioxide in a new role of sulfur extrusion in thioamides

Abstract A simple and efficient procedure for the mild conversion of thioamides to amides in good yields using active manganese dioxide is described.

Regiocontrolled set promoted photocyclisation of 2-alkyl-1-piperidine and pyrrolidine propanols : stereoselective synthesis of cis-α,α'-dialkyl piperidines and pyrrolidines via tetrahydro-1,3-oxazines

Abstract Photocyclisation of amino alcohols (1a-c) to (4a-c) via insitu generated iminium cation by photoinduced SET reaction and their utility in the stereoselective synthesis of cis-α-α′-dialkyl piperidines and pyrrolidines is described.

An Efficient Synthesis of Coumestans-A Probable Biogenetic Approach

Abstract A probable biogenetic type synthesis of coumestans by coupling in-situ generated o-quinones by mushroom tyrosinase oxidation of catechol and 4-hydroxy coumarins is reported.