Darstellung von Bis(S-methoxycarbonylthio)-B-Kette des Rinderinsulins

Abstract
The bis(S-methoxycarbonylthio)-B-chain of beef insulin was synthesized from B-chain bis(S-sulfonate) and methoxycarbonyl-sulfenylchloride, and reacted with thioglycolic acid and cysteine in acidic solution to the corresponding unsymmetrical disulfides in 80% yield.