Reactions of dehydrodithizone with dimethyl acetylenedicarboxylate and with benzyne. X-Ray crystal structure of azobenzene N-(4,5-bis-methoxycarbonylthiazol-2-yl)imide, a stable dipole
Abstract
Dehydrodithizone adds dimethyl acetylenedicarboxylate to yield the title compound (7), whose structure was determined by single-crystal X-ray analysis. 2-Phenylazobenzothiazole and azobenzene were obtained from dehydrodithizone and benzyne. These products are thought to be formed by the decomposition of initial 1,3-cycloadducts.