Activation of silicon-hydrogen, silicon-oxygen, silicon-nitrogen bonds in heterogeneous phase
作者:R.J.P. Corriu、R. Perz、C. Reye
DOI:10.1016/s0040-4020(01)88599-9
日期:1983.1
reported: Si-H activated by KF or CsF is a very powerful and selective reducing reagent; the carbonyl group of aldehydes, ketones or esters can be reduced without reduction of other functional groups (C&z.dbnd;C, NO2, Br, amido). Furthermore, selective reductions of aldehydes in the presence of ketones and ketones in the presence of carboxylic esters are also possible. CsF in the presence of Si(OR)4 is
据报道,在非均相条件下,氟离子对Si-H,Si-O和Si-N键的阴离子活化作用:由KF或CsF活化的Si-H是一种非常有效的选择性还原剂。醛,酮或酯的羰基可被还原而不还原其他官能团(C,C 2,NO 2,Br,酰胺基)。此外,在酮存在下和在羧酸酯存在下酮的选择性还原醛也是可能的。Si(OR)4存在下的CsF已发现在促进不同种类的迈克尔受体上的单酮和芳基乙腈的迈克尔加成反应方面非常有效,例如⇌,β不饱和酮,酯,腈甚至酰胺。这构成了迈克尔反应的扩展,因为即使在拥挤的酮中也会发生加成反应。被氟离子激活的N,N双(甲硅烷基)烯胺与羰基化合物反应并提供了通往2-氮杂-1,3二烯的有趣途径。