作者:Michael S. Malamas、Cynthia L. Palka
DOI:10.1002/jhet.5570330241
日期:1996.3
A new synthesis of 5-substituted isoxazolidines was developed by direct isoxazolidine ring formation of allylic hydroxylamines under acidic conditions. The cyclization process is an electrophilic SN1 type reaction. The formed carbocation intermediate is stabilized by electron rich groups (i.e., phenyl). A moiety that mediates oxonium ion formation (i.e., para-methoxy) accelerates the rate of product
通过在酸性条件下直接形成烯丙基羟胺的异恶唑烷环,开发了5-取代的异恶唑烷的新合成方法。环化过程是亲电的S N 1型反应。形成的碳正离子中间体被富电子基团(即苯基)稳定化。介导氧鎓离子形成的部分(即,对-甲氧基)加速了产物形成的速率。