作者:Robert T. Conlin、Young-Woo Kwak
DOI:10.1016/0022-328x(85)80285-0
日期:1985.9
trimethylsilyldiazomethane to ethylene at 55°C yields 1-trimethylsilyl-2-pyrazoline exclusively. The thermal isomerization of 3-trimethylsilyl-1-pyrazoline to 1-trimethylsilyl-2-pyrazoline has been followed kinetically by proton NMR spectroscopy and the reverse reaction has been detected by gas phase pyrolysis. Thermal elimination of nitrogen from either pyrazoline leads to cyclopropyltrimethylsilane, allyltrimethylsilane
通过在室温下将重氮甲烷添加到乙烯基三甲基硅烷中来合成化合物3-三甲基甲硅烷基-1-吡唑啉。相反,在55℃下将三甲基甲硅烷基重氮甲烷添加到乙烯中仅产生1-三甲基甲硅烷基-2-吡唑啉。通过质子NMR光谱动力学地跟踪3-三甲基甲硅烷基-1-吡唑啉的热异构化为1-三甲基甲硅烷基-2-吡唑啉,并且已经通过气相热解检测了逆反应。从任一吡唑啉中热消除氮会生成环丙基三甲基硅烷,烯丙基三甲基硅烷和E-和Z -1-丙烯基三甲基硅烷。亚甲基-H迁移至自由基中心α和γ至硅的相对速率大致相等。