Polaroid Corporation

Charles A Kelly

Frank A Meneghini

This invention relates to certain 3-(thiazolidin-2'-yl)-4-hydroxy-phenyl sulfonic acids and to a method of converting said sulfonic acids to the corresponding sulfonyl chlorides by reacting said acid with neat thionyl chloride or with thionyl chloride in a chlorinated hydrocarbon. In another embodiment, the 3-(thiazolidin-2'-yl)-4-hydroxy-phenyl sulfonic acid is synthesized, without isolating intermediates, starting with the sulfonation of salicylaldehyde and then forming the 3-(thiazolidin-2'-yl) substituent.

Growing community of inventors

Dorchester, MA, United States of America

Charles A Kelly