Process for preparing predominantly Z-substituted allylic alcohols of the formula: ##STR1## wherein R.sup.1 is a straight or branched C.sub.1 -C.sub.25 alkyl group optionally bearing at least one substituent and/or at least one unsaturated linkage and R.sup.2 is a hydrogen atom or a methyl group, which comprises reacting a vinyl epoxide of the formula: ##STR2## wherein R.sup.2 is as defined above with an organolithium compound of the formula above. More particularly, there is disclosed a process for R.sup.1 --Li wherein R.sup.1 is as defined above; particularly, process for preparing .alpha.-santalol of the formula: ##STR3## which comprises reacting 3-methyl-3,4-epoxybutene-1 with lithiomethyl-2,3-dimethyltricyclo[2.2.1.0.sup.2,6 ]heptane.
Process for preparing predominantly Z-substituted allylic alcohols
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。
A stereoselective synthesis of β,γ-disubstituted allylic alcohols of z-configuration
作者:Mitsuhisa Tamura、Gohu Suzukamo
DOI:10.1016/s0040-4039(01)90159-5
日期:——
US5004843A
申请人:——
公开号:US5004843A
公开(公告)日:1991-04-02
Photoredox Activation of SF<sub>6</sub>for Fluorination
作者:T. Andrew McTeague、Timothy F. Jamison
DOI:10.1002/anie.201608792
日期:2016.11.21
We report the first practical use of SF6 as a fluorinating reagent in organic synthesis. Photoredoxcatalysis enables the in situ conversion of SF6, an inert gas, into an active fluorinating species by using visiblelight. Under these conditions, deoxyfluorination of allylic alcohols is effected with high chemoselectivity and is tolerant of a wide range of functional groups. Application of the methodology