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    • 94. 发明授权
    • Preparation of 1,1-diphenyl-2-carboethoxycyclopropane
    • 制备1,1-二苯基-2-乙酰氧基环丙烷
    • US4605755A
    • 1986-08-12
    • US761987
    • 1985-08-02
    • Andrea Leone-Bay
    • Andrea Leone-Bay
    • C07C69/76
    • C07C69/76
    • An improved process is disclosed for preparing racemic 1,1-diphenyl-2-carboethoxycyclopropane from 1,1-diphenylethylene and ethyl diazoacetate as reactants. It involves conducting the reaction in the absence of a metallic-based catalyst and at a reaction temperature sufficiently in excess of 60.degree. C. to permit a yield of at least 20 percent to be obtained. Preferred conditions are given for obtaining yields in excess of 80 percent.Related processes are also disclosed based on certain substituted 1,1-diphenylethylenes with at least one substituent in at least one phenyl group.
    • 公开了从1,1-二苯基乙烯和重氮乙酸乙酯作为反应物制备外消旋的1,1-二苯基-2-乙氧羰基环丙烷的改进方法。 它包括在没有金属基催化剂的情况下进行反应,并且在足够超过60℃的反应温度下进行反应,以获得至少20%的产率。 给出优选的条件是获得超过80%的产率。 还基于某些具有至少一个苯基中至少一个取代基的取代的1,1-二苯乙烯公开了相关方法。