Reactions de michael sur des amides α,β insatures activees par le systeme CsF/Si(OCH3)4
作者:C. Chuit、R.J.P. Corriu、R. Perz、C. Reye
DOI:10.1016/s0040-4020(01)90609-x
日期:1986.1
Michael additions of compounds having acidic hydrogen (ketones, nitro derivatives, ethyl cyanacetate and ethyl malonate) on α,β unsaturated amides are carried out in the presence of the system CsF/Si(OCH3)4. The reaction takes place in heterogeneous medium without solvent. Final products are obtained (in good yields) without hydrolysis. Normal 1–4 addition products are obtained with tertiary α,β ethylenic
在系统CsF / Si(OCH 3)4的存在下,在α,β不饱和酰胺上进行具有酸性氢原子的化合物(酮,硝基衍生物,氰基乙酸乙酯和丙二酸乙基酯)的迈克尔加成反应。反应在没有溶剂的非均相介质中进行。无需水解即可获得最终产品(收率很高)。正常的1-4加成产物是由叔α,β烯酰胺获得的,而伯α,β烯酰胺则导致戊二酰亚胺或二氢吡啶酮类化合物衍生自最初形成的1-4加成产物。