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研究了季铵盐A 1催化二氯卡宾与环己烯的加成反应 ,考察了不同相转移催化剂的催化活性、反应温度、催化剂用量、反应时间对产物 7,7 二氯双环 [4 1 0 ]庚烷收率的影响 .在优化反应条件 (即反应温度为 5 0℃ ,反应时间为 5h)下 ,以季铵盐A 1为相转移催化剂 ,产率可达 94 0 % .实验证明 ,季铵盐A 1的催化活性要优于其它短碳链的季铵盐和聚乙二醇 ,并且在分离过程中不乳化 ,使产物易于分离纯化
The quaternary ammonium salt A 1 was used to catalyze the addition reaction of dichlorocarbene with cyclohexene. The catalytic activity, reaction temperature, catalyst dosage and reaction time of different phase-transfer catalysts were investigated. ] Heptane yield.Under the optimal reaction conditions (ie, the reaction temperature is 50 ℃, the reaction time is 5h), the yield of quaternary ammonium salt A 1 is 94 0% The quaternary ammonium salt A 1 has better catalytic activity than other short carbon chain quaternary ammonium salts and polyethylene glycol, and does not emulsify during the separation, so that the product can be easily isolated and purified