Efficiently monitored reduction of carboxylic acids into alcohols or aldehydes via 2-thiazoline-2-thiol esters by sodium borohydride or di-isobutylaluminium hydride

Abstract
Carboxylic acids were converted into their 2-thiazoline-2-thiol esters (1), which were treated with sodium borohydride or di-isobutylaluminium hydride to give the alcohols (2) or the aldehydes (3) respectively, in good yields.