Ih. Gilbert et al., SYNTHESIS OF BETA-KETO AND ALPHA,BETA-UNSATURATED N-ACETYLCYSTEAMINE THIOESTERS, Bioorganic & medicinal chemistry letters, 5(15), 1995, pp. 1587-1590
Methods for the synthesis of N-acetylcysteamine thioesters of beta-ket
o and alpha,beta-unsaturated acids which avoid problems associated wit
h methods requiring the intermediacy of the free acids are described,
along with a convenient method for the removal of excess thiol from re
action mixtures using copper sulphate impregnated silica.