Diisothiocyanates as heterodienophiles or dipolarophiles in the presence of ?-thioxothioamides or mesoionic thiazoles
作者:Georges Morel、Evelyne Marchand
DOI:10.1002/hc.1093
日期:——
Reactions of α-thioxothioamides (1) with diisothiocyanates were carried out in the hope of generating the N,N′-bis(1,3-thiazoline-2-thiones) (A). Although that purpose could not be achieved, we succeeded in preparing the monocycloadducts 7 from the phenylene-1,2-diisothiocyanate (4). The benzimidazole derivatives 8 and 9 were also characterized and a mechanism was assumed to account for this intramolecular