Observations on the direct amidocyclopropanation of alkenes using organozinc carbenoids
作者:William B. Motherwell、Guillaume Bégis、David E. Cladingboel、Laure Jerome、Tom D. Sheppard
DOI:10.1016/j.tet.2007.03.027
日期:2007.7
A series of amidocyclopropanes were prepared by direct amidocyclopropanation of alkenes, using organozinc carbenoids generated from readily available diethoxymethylamides. The amidocyclopropanation of monosubstituted alkenes led to selective formation of the trans-amidocyclopropane in most cases, but with more substituted alkenes, the stereochemical outcome of the cyclopropanation reactions was unpredictable
通过使用由容易获得的二乙氧基甲基酰胺产生的有机锌类胡萝卜素,通过烯烃的直接酰胺基环丙烷化制备一系列酰胺基环丙烷。在大多数情况下,单取代烯烃的酰胺基环丙烷化会导致反式-酰胺基环丙烷的选择性形成,但是在更多取代的烯烃的情况下,环丙烷化反应的立体化学结果是无法预测的。酰胺基环丙烷产物可以容易地修饰成结构上令人感兴趣的含有氨基酸或氨基醇的环丙烷。