A Direct, Chemo-, and Regioselective Cross-Coupling Reaction of Arenes via Sequential Directed <i>ortho</i> Cuprations and Oxidation
作者:Noriyuki Tezuka、Keiichi Hirano、Masanobu Uchiyama
DOI:10.1021/acs.orglett.9b03719
日期:2019.12.6
Direct cross-coupling of Csp2-H/Csp2-H bonds of two arenes was achieved in 30-76% yield via sequential directed ortho cuprations (DoCu) with the cuprate base (TMP)2Cu(CN)Li2 (1, TMP = 2,2,6,6-tetramethylpiperidido), followed by oxidation. This methodology offers easy access to unsymmetric biaryls from arenes with a variety of directed metalation groups (DMGs) and ancillary functional groups, taking
通过使用连续的定向邻位铜(DoCu)与铜酸根(TMP)2Cu(CN)Li2(1,TMP = 2)进行连续的定向邻位配位(DoCu),可以以30-76%的产率实现两个芳烃的Csp2-H / Csp2-H键的直接交叉偶联。 (2,6,6-四甲基哌啶基),然后氧化。利用1的高度化学选择性作用,该方法可轻松从具有各种定向金属化基团(DMG)和辅助官能团的芳烃中获得不对称联芳基。