Up the Hill: Selective Double-Bond Isomerization of Terminal 1,3-Dienes towards Z-1,3-Dienes or 2Z,4E-Dienes
作者:Florian Pünner、Anastasia Schmidt、Gerhard Hilt
DOI:10.1002/anie.201107512
日期:2012.1.27
different cobalt catalyst systems led to the selective isomerization of 1,3‐dienes. In the case of the [CoBr2(py‐imine)]‐catalyzed reaction, the Z‐1,3‐diene was formed in a highly selective manner (see scheme). When the catalyst precursor [CoBr2(dpppMe2)] was applied, a double‐bond migration and selective isomerization towards the 2Z,4E‐configured 2,4‐dienes were observed
千方百计:两种不同的钴催化剂体系导致1,3-二烯的选择性异构化。在[CoBr 2(py- imine )]催化的反应中,Z -1,3-二烯是以高度选择性的方式形成的(参见方案)。当使用催化剂前体[CoBr 2(dpppMe 2)]时,观察到了向2 Z,4 E构型的2,4-二烯的双键迁移和选择性异构化。