Allylic Substitution on Cyclopentene and -hexene Rings with Alkynylcopper Reagents
作者:Qian Wang、Yuichi Kobayashi
DOI:10.1021/ol202711k
日期:2011.12.2
Substitution of cyclic allylic picolinates with a reagent derived from TMS-C≡CMgBr and a copper salt was investigated. Although the previous type of reagent (TMSC≡CMgBr and CuBr·Me2S) developed for linear allylic picolinates was less product selective and regioselective, the Cu(acac)2-derived reagent was highly selective (94–95%) to afford the SN2′ product in good yields. As an application, several C–C bond
研究了用TMS-C≡CMgBr和铜盐衍生的试剂取代环状烯丙基吡啶甲酸酯。尽管先前开发的用于线性烯丙基吡啶甲酸的试剂类型(TMSC≡CMgBr和CuBr·Me 2 S)具有较少的产物选择性和区域选择性,但是衍生自Cu(acac)2的试剂具有很高的选择性(94-95%),可以提供S N 2'产物收率高。作为一种应用,成功地研究了在炔碳上的几个C–C键的形成和PG中间体的合成。