作者:Timothy J Donohoe、Paul M Guyo、Rakesh R Harji、Madeleine Helliwell、Rick P.C Cousins
DOI:10.1016/s0040-4039(98)00362-1
日期:1998.5
The Birch reduction of electron-deficient 3-substituted pyrroles is described. Use of a reductive alkylation procedure involving sodium metal in liquid ammonia gave good yields of 4-alkyl-2-pyrrolines. The identity of these products was proven by an X-ray structure of a crystalline derivative. Moreover, the pyrroles used in this study could be readily prepared by reaction of TOSMIC with acrylic amides
描述了缺电子的3-取代的吡咯的桦木还原。使用在液态氨中包含钠金属的还原性烷基化方法,可获得4-烷基-2-吡咯啉的良好产率。通过结晶衍生物的X射线结构证明了这些产物的身份。此外,本研究中使用的吡咯可以通过TOSMIC与丙烯酸酰胺和酯的反应轻松制备,一旦还原完成,酯活化基团就可以轻松除去,从而得到相应的N-保护的β-脯氨酸衍生物。