The Thermal Isomerizations of Bicyclo[2.1.0]pent-5-yl Methyl Ketones:endo-exo stereomutation and cyclopropyl-allylic rearrangement to cyclopent-2-enyl methyl ketones
作者:Jean-Pierre Grosclaude、Hans-Ulrich Gonzenbach、Jean-Claude Perlberger、Kurt Schaffner
DOI:10.1002/hlca.19760590830
日期:1976.12.15
Bicyclo[2.1.0]pent-5-yl methyl ketones undergo two thermal isomerization reactions. The endo-exo stereomutation follows the ring-flip path in better than 90%, with inversion of the configuration of the angular carbon atoms by cleavage and reclosure of the central bond. Stereomutation and cyclopropyl-allylic rearrangement to cyclopent-2-enyl methyl ketone do not involve a common intermediate and proceed
双环[2.1.0]戊-5-基甲基酮经历两个热异构化反应。的内-外stereomutation如下更好的大于90%的环翻转路径,具有通过切割和中央键的重合闸的角的碳原子的构型反转。立体突变和环丙基烯丙基重排成环戊-2-烯基甲基酮不涉及共同的中间体,而是在单独的势能面上进行。重排的激活参数表明允许一致的环还原过程。