Bikash Pal

Versatile Reagent for Reduction of Azides to Amines

Abstract Triphenylphosphine (TPP) in refluxing methanol effectively reduces a variety of azides 1a–k to amines 2a–k in very good yields.

Microwave Assisted Pictet–Spengler and Bischler–Napieralski Reactions

Abstract Pictet–Spengler and Bischler–Napieralski reaction products have been prepared–using microwave irradiation on silicagel support under solvent free condition. Microwave assisted reactions have resulted in better yields of the desired products than prepared under conventional conditions.

MICROWAVE ASSISTED McFADYEN–STEVENS AND HUANG–MINLON REACTIONS

ABSTRACT Microwave irradiation has been employed in McFadyen–Stevens reaction to convert p-toluenesulfonyl hydrazides 1 to the aldehydes 2. Also, microwave has been applied in Huang–Minlon reduction of carbonyl compounds 3 to the corresponding hydrocarbons 4.

Selective reduction of aldehydes to alcohols using alumina with a catalytic amount of base under microwave irradiation

Abstract Aldehydes are selectively reduced to the corresponding alcohols in very good yields with alumina containing a catalytic amount of base under microwave irradiation at 300 W for 8–15 min.