The Synthesis and 1,4-Addition Type Ring-opening Polymerization of <i>N</i>-Substituted Cyclic Iminocarbonates

Abstract

Abstract As one of a series of studies of 1,4-addition type ring-opening polymerizations, the synthesis and ring-opening polymerization of N-substituted cyclic iminocarbonates have been studied. N-Alkyl and N-aryl cyclic iminocarbonates have been prepared by the reaction of sodium ethylene glycorate with the corresponding imidophosgenes. N-Halogeno cyclic iminocarbonates have been prepared from glycols, potassium cyanide and halogenes. The ring-opening polymerization of the N-substituted cyclic iminocarbonates, which are considered to be cyclic enol derivatives of urethanes, in the presence of cationic catalysts gives the corresponding poly(ethylene N-substituted carbamates).