申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0029603A1
公开(公告)日:1981-06-03
Process for preparing predominantly Z-substituted allylic alcohols of the formula I
wherein R1 is a straight or branched C1-C25 alkyl group optionally bearing at least one substituent and/or at least one unsaturated linkage and R2 is a hydrogen atom or a methyl group, which comprises reacting a vinyl epoxide of the formula II
wherein R2 is as defined above with an organolithium compound oftheformula III
wherein R1 is as defined above; particularly, process for preparing a-santalol oftheformula:
which comprises reacting 3-methyl-3,4-epoxybutene-1 with 3-lithiomethyl-2,3-dimethyltricyclo(2.21.02,6 heptane.
式 I 主要为 Z 取代的烯丙基醇的制备方法
其中 R1 为直链或支链 C1-C25 烷基,可选择带有至少一个取代基和/或至少一个不饱和连接基,R2 为氢原子或甲基,该工艺包括使式 II 的乙烯基环氧化物与式 III 的有机锂化合物反应
其中 R2 如上定义,与式 III 的有机锂化合物反应
其中 R1 如上定义;特别是制备式 a-山梨醇的工艺:
其中包括将 3-甲基-3,4-环氧丁烯-1 与 3-硫代甲基-2,3-二甲基三环(2.21.02,6)庚烷反应。