作者:Kenneth B. Wiberg、Neil McMurdie、John V. McClusky、Christopher M. Hadad
DOI:10.1021/ja00076a025
日期:1993.11
o C, it reacts to form cyclopentadiene. Evidence is presented that tricyclo[2.1.0.0 1.3 ]pentane, an isomer of [1.1.1]propellane, is formed as an intermediate. It could be trapped with phenylthiol to give 2-vinylcyclopropyl phenyl sulfide, and a 13 C NMR signal attributed to the tricyclopentane also was observed. The course of its conversion to cyclopentadiene, which must involve inversion of configuration
研究了 1-溴-2-(氯甲基)双环[1.1.0]丁烷与甲基锂的反应。在-78 o C,形成1-锂硫-2-(氯甲基)双环丁烷,在-50 o C,它反应形成环戊二烯。有证据表明,三环[2.1.0.0 1.3 ]戊烷是[1.1.1]丙烷的异构体,是作为中间体形成的。它可以被苯硫醇捕获,得到 2-乙烯基环丙基苯硫醚,并且还观察到归因于三环戊烷的 13 C NMR 信号。从理论上探索了其转化为环戊二烯的过程,该过程必须涉及一个碳中心的构型反转。最初,中央 CC 键之一随着附着氢的旋转而延长,导致过渡态