Selective CN bond cleavage of 4-silyl-substituted 1,2-thiazetidine 1,1-dioxides with EtAlCl2: Stereospecific formation of (E)-vinylsulfonamides
作者:Tadashi Kataoka、Tetsuo Iwama、Atsuko Takagi
DOI:10.1016/0040-4039(96)00269-9
日期:1996.3
Monosilylation of 1,2-thiazetidine1,1-dioxides (β-sultams) furnished β-sultams stereoselectively. Treatment of 4-silylated β-sultams with a Lewis acid caused the selectiveCNbondcleavage because of the β-silyl stabilization against the resultant carbenium ion followed by desilylation to provide (E)-vinylsulfonamidesstereospecifically.