independently. The silicon-substituted (S)-phenylethylamine derivative adds to methyl acrylate and forms, upon hydrolysis, methyl (S)-3-(2-oxocyclohexyl)propane carboxylate. The tautomeric imine leads to the (R)-enantiomer. Surprisingly, in the presence of a Lewis acid, the ring-containing organosilicon-substituted derivatives show lower stereoselectivity than the corresponding tin compounds.
森达之间的异构化方法3 -取代的烯胺和
亚胺(Ñ ⇌ Ç -Si)是如此之慢,每个异构体能够独立地反应。
硅取代的(S)-苯
乙胺衍
生物加成
丙烯酸甲酯,并在
水解时形成(S)-3-(2-氧代环己基)
丙烷甲酸甲酯。互变异构
亚胺产生(R)-对映异构体。令人惊讶地,在
路易斯酸的存在下,含环的有机
硅取代的衍
生物显示出比相应的
锡化合物低的立体选择性。