Use of zinc borohydride for efficient reduction of carboxylic ester to alcohol. Seleclive reduction of aliphatic ester in presence of aromatic ester under sonication

An efficient methodology using zinc borohydride under sonification for the reduction of carboxylic esters to alcohols in presence of N,N-dimethylaniline and selective reduction of an aliphatic ester over an aromatic one without N,N-dimethylaniline is described.