Synthesis of 1-Bicyclo [3.2.2]nonene and 1 (7)-Bicyclo [3.2.2]nonene by IntramolecularWittig Reaction
作者:Konrad B. Becker、Jacques L. Chappuis
DOI:10.1002/hlca.19800630709
日期:1980.10.29
The synthesis of 1-bicyclo[3.2.2]nonene (2) and of 1 (7)-bicyclo [3.2.2]nonene (3), two isomeric bridged (E)-cycloheptenes, by intramolecular Wittig reaction is described. These ‘Bredt olefins’ could not be isolated, but dimerized rapidly. In both cases, the main product was shown to be a head-to-tail dimer with a cyclobutane ring. The ‘Bredt olefins’ were also trapped in situ with furan or 2,5-diphenylbenzo
描述了通过分子内Wittig反应合成1-双环[3.2.2]壬烯(2)和1(7)-双环[3.2.2]壬烯(3)的两个异构体桥连的(E)-环庚烯的方法。这些“ Bredt烯烃”无法分离,但会迅速二聚。在这两种情况下,主要产物均显示为具有环丁烷环的头对尾二聚体。在“ Bredt烯烃”也被困在原位与呋喃或2,5-二苯基苯并[ C ^ ]呋喃。