An equimolar reaction of thiocyanatoacetic esters with aromatic aldehydes in the presence of sodium hydride, followed by treatment with hydrogen chloride, led to a mixture of 4- alkoxycarbonyl-5-aryl-2-imino-1, 3-oxathiolane hydrochloride (3) and α-(S-carbamoylthio)- βchlorodihydrocinnamic ester (4). When excess aldehyde was used in the reaction, a small amount of 2, 10-bis (α-chlorobenzyl)-4, 8-dioxo-6-phenyl-5, 7-diaza-3, 9- ...
