Reaction of aminothiazole-oximetosylates with thiols, II
摘要:
The reaction of ethyl 2-(2-acetyl- or 2-formyl-amidothiazol-4-yl)-2-tosyloxyiminoacetate with thiols in the presence of triethylamine gave the corresponding sulfenylimines. When acetone was used as solvent the reaction led to 2,2-dimethyl-4-(2-acetyl- or 2-formyl-amido-thiazol-4-yl)-5-oxo-2,5-dihydro-1,3-oxazole. In 2-butanone or cyclohexanone similar oxazolinone derivatives were obtained. The structure of the products was elucidated by ir, H-1-and C-13-nmr spectroscopy, and a reaction mechanism is suggested for their formation.