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