Efficient Synthesis of Sterically Hindered Arenes Bearing Acyclic Secondary Alkyl Groups by Suzuki-Miyaura Cross-Couplings
作者:Chengxi Li、Tianyu Chen、Bowen Li、Guolan Xiao、Wenjun Tang
DOI:10.1002/anie.201411518
日期:2015.3.16
Bulky P,PO ligands were designed to inhibit isomerization and reduction side reactions during the cross coupling between sterically hindered aryl halides and alkylboronic acids. Suzuki–Miyaura cross‐couplings between di‐ortho‐substituted aryl bromides and acyclic secondary alkylboronic acids have been achieved with high yields. The method has also enabled the preparation of ortho‐alkoxy di‐ortho‐substituted
庞大的P,P = O配体设计用于在位阻芳基卤化物和烷基硼酸之间的交叉偶联过程中抑制异构化和还原副反应。高产率地实现了二邻位取代的芳基溴化物和无环仲烷基硼酸之间的Suzuki-Miyaura交叉偶联。该方法还能够以优异的收率制备带有异丙基的邻烷氧基双邻取代芳烃。合成方法的实用性已在雌酮的后期修饰中以及在向棉酚的新合成途径中的应用中得到了证明。