[PROBLEMS] To provide a novel method for the allylation of N-acylhydrazones by which enantioselectively allylated N-acylhydrazines can be efficiently obtained.
[MEANS FOR SOLVING PROBLEMS] A method for the production of enantioselectively allylated N-acylhydrazines represented by the general formula [3]:
[wherein R° is an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group, or -COOR1 (wherein R1 is a hydrocarbon group) ; R2 is acyl; R3 and R4 are each hydrogen, or one of R3 and R4 is hydrogen and the other is a hydrocarbon group; and R5 and R6 are each independently hydrogen or a hydrocarbon group], characterized by reacting an N-acylhydrazone represented by the general formula [1]:
[wherein R0 and R2 are as defined above] with an allylating agent such as allyltrichlorosilane or crotyltrichlorosilane in the presence of a chiral phosphine oxide.
[问题] 提供一种新型的 N-酰基
肼烯丙基化方法,通过该方法可以有效地获得对映 选择性烯丙基化的 N-酰基
肼。
[解决问题的方法] 一种生产由通式[3]表示的对映体选择性烯丙基化的 N-酰
肼的方法:
[其中R°是任选取代的烃基、任选取代的杂环基或-COOR1(其中R1是烃基);R2是酰基;R3和R4各自是氢,或R3和R4中的一个是氢,另一个是烃基;以及R5和R6各自独立地是氢或烃基〕,其特征在于使通式〔1〕表示的N-酰
肼反应:
[其中 R0 和 R2 如上定义]与烯丙基化剂如烯丙基三
氯硅烷或
巴豆基三
氯硅烷在手性氧化膦存在下反应。