Investigations on the Preparation of a Thiirene Chloro[ N -methyl- N -(phenyl)thiocarbamoyl]thioacetic S -phenyl ester (1) reacts in alcoholic medium with intramolecular elimination of HCl to give (3-methylbenzothiazolin-2-y1idene)- thioacetic S -phenyl ester (5) and -acetic alkyl esters...