作者:Alexandre Rulev、Jacques Maddaluno
DOI:10.1002/1099-0690(200107)2001:13<2569::aid-ejoc2569>3.0.co;2-1
日期:2001.7
The reaction between primary amines and 2-bromo-2-(cycloalkylidene)acetates in alcohol under high pressure provides the expected spiroaziridines in good yields and diastereomeric excesses. With bulky or aromatic amines, this reaction competes with the migration of the double bond, which, migrating from an exo to an endocyclic position, provides an intermediate allylic α-bromo ester, immediately converted
伯胺和 2-溴-2-(亚环烷基) 乙酸酯在高压下在醇中的反应以良好的产率和非对映体过量提供了预期的螺氮丙啶。对于体积大的或芳香胺,该反应与双键的迁移竞争,双键从外环位置迁移到环内位置,提供中间烯丙基 α-溴酯,立即转化为 α-氨基酯。还可以开发串联版本,将相同的高压条件应用于 1,4-双-环己叉乙酸酯。相应的双螺氮丙啶以良好的收率和适度的脱色获得。然而,该反应在使用 2-氯-2-(环亚丙基)乙酸酯时没有成功,其仅以低产率产生戊二酸衍生物。