Ketenimines were conveniently synthesized from N-monosubstituted thioacetamides with dehydrating agents such as 2-chloro-1,3-dimethylimidazolinium chloride or 2-chloro-1-methylpyridinium iodide.
Thione<i>S</i>-Imide. Reaction with Heterocumulenes
作者:Takao Saito、Isao Oikawa、Shinichi Motoki
DOI:10.1246/bcsj.53.2582
日期:1980.9
S-p-toluenesulfonimide reacted with diphenylketene to give two regioisomeric 1,3-dipolar cycloadducts. The thione S-imide and symmetrical dialkylcarbodiimides produced 3-tosylimino-1,2,4-thiadiazolidines. In the reaction with ketenimines, there occurred siteselective cycloadditionreactions on C=N vs. C=C bonds in the imines and further rearrangement of the 1,2,4-thiadiazolidine adducts.