The reactions of tris(trimethylsilyl)methyl-lithium with some carbon electrophiles
作者:Ian Fleming、Christopher D. Floyd
DOI:10.1039/p19810000969
日期:——
non-enolisable aldehydes, ketones, and acid chlorides, and with some epoxides, with the formation of carbon–carbon bonds. This method of preparing functionalized silanes is limited by the readiness with which (1) abstracts a proton, if one is available, rather than attacks at carbon. In the reaction with epoxides, the product alkoxide can transfer a silyl group from carbon to oxygen, and in one case the
三(三甲基甲硅烷基)甲基锂(1)与不可烯化的醛,酮,酰氯和某些环氧化物发生反应,形成碳-碳键。这种制备官能化硅烷的方法受到准备工作的限制,准备工作是:(1)提取质子(如果有的话)而不是提取碳。在与环氧化物的反应中,产物醇盐可以将甲硅烷基基团从碳转移至氧,并且在一种情况下,如此形成的中间体反应生成环丙烷(32),其为彼得森反应的同系物。当所得的碳负离子通过苯硫基和二苯基膦酰基等基团稳定时,在其他系统中会发生甲硅烷基的1,4-转移。