Synthesis of New Azocine Derivatives and Their Functionalization by Nucleophilic Addition to Their Iminium Salts
作者:Angela Cristina Leal Badaró Trindade、Daniela Cristina dos Santos、Laurent Gil、Christian Marazano、Rossimiriam Pereira de Freitas Gil
DOI:10.1002/ejoc.200400728
日期:2005.3
eight-membered nitrogen heterocycles 20a,b is described starting from the 3-alkyl-N-benzylpyridinium salts 14a,b. These azocine derivatives were converted into their respective iminium salts 11 by treatment with methanesulfonic acid. A study concerning the regioselectivity of nucleophilic additions to these salts is presented. Nucleophiles like hydride or Grignard reagents react selectively in the 2-position
描述了从 3-烷基-N-苄基吡啶鎓盐 14a、b 开始生成八元氮杂环 20a、b 的路线。通过用甲磺酸处理,这些偶氮辛衍生物被转化为它们各自的亚胺盐11。介绍了对这些盐的亲核加成的区域选择性的研究。亲核试剂如氢化物或格氏试剂在 2 位选择性反应生成加合物,如 22 和 23,而叠氮化物和苯硫醇盐分别攻击 6 位生成 24 和 25。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)