作者:Toru Minami、Futoshi Takimoto、Toshio Agawa
DOI:10.1246/bcsj.48.3259
日期:1975.11
N-Sulfinylsulfonamides, 1a, b, reacted with ketenimines, 2, in ether to give the unstable [2+2] cycloadducts, 3-ylidene-1,2,4-thiadiazetidin-1-oxides, 3, which were then readily hydrolyzed to the N,N′’-disubstituted amidine derivative, 4, in good yields. The reaction of N-sulfinylmethanesulfonamide (1b) with diphenylketen-N-p-tolylimine (2d) at 130 °C gave the exchange product, N-sulfinyl-p-toluidine
N-Sulfinylsulfonamides, 1a, b, 与 ketenimines, 2, 在乙醚中反应得到不稳定的 [2+2] 环加合物, 3-ylidene-1,2,4-thiadiazetidin-1-oxides, 3, 然后很容易水解N,N''-二取代脒衍生物,4,收率良好。N-亚磺酰基甲磺酰胺 (1b) 与二苯基烯酮-Np-甲苯亚胺 (2d) 在 130°C 反应得到交换产物 N-亚磺酰基-对甲苯胺 (5),通过中间体环加合物的产率为 70%。与2d相反,N-亚磺酰基-对甲苯磺酰胺(1a)和苯乙酮-N-苯基亚胺(2f)在相同条件下的反应导致形成N-苯基-N'-p-的混合物甲苯磺酰基-2-苯基-反-(6a)和顺-2-丁烯脒(6b),产率为81%。