Generation and Reaction of Alkene Radical Cations under Nonoxidizing Conditions: Synthesis of the Pyrrolizidine Nucleus
作者:David Crich、Krishnakumar Ranganathan、Xianhai Huang
DOI:10.1021/ol015965h
日期:2001.6.1
[see reaction]. Stable beta-phosphatoxy nitroalkanes, readily assembled by the Henry reaction and subsequent phosphorylation, serve as good precursors to alkene radical cations on treatment with triphenyltin or tributyl hydride and AIBN in benzene at reflux. When the beta-phosphatoxy nitroalkane is suitably functionalized with nucleophilic groups, substitutions can be achieved with the formation of
[请参阅反应]。稳定的β-磷酸氧基硝基烷烃易于通过亨利反应和随后的磷酸化反应组装,在三苯锡或氢化三丁基氢化物和AIBN在苯中回流下处理时,可作为烯烃自由基阳离子的良好前体。当β-磷酸氧基硝基烷被亲核基团适当地官能化时,可以通过形成杂环来实现取代。当亲核试剂是烯丙胺时,会发生串联过程,从而产生吡咯并核苷。