Copper-Catalyzed Intramolecular Desymmetric Aryl CO Coupling for the Enantioselective Construction of Chiral Dihydrobenzofurans and Dihydrobenzopyrans
作者:Wenqiang Yang、Yangyuan Liu、Shasha Zhang、Qian Cai
DOI:10.1002/anie.201503882
日期:2015.7.20
O‐Heterocyclic structures such as 2,3‐dihydrobenzofurans are key motifs in many natural compounds and pharmaceuticals. Enantioselective formation of chiral dihydrobenzofurans and analogues was achieved through a copper‐catalyzed desymmetrization strategy with a chiral cyclic 1,2‐diamine. A broad range of substrates are compatible with this CuI‐diamine catalytic system and afford the desired coupling
诸如2,3-二氢苯并呋喃之类的O杂环结构是许多天然化合物和药物中的关键基序。手性二氢苯并呋喃及其类似物的对映选择性形成是通过铜催化的手性环状1,2-二胺的去对称化策略实现的。各种各样的底物都可以与这种Cu I-二胺催化体系兼容,并在温和条件下以高收率和良好至优异的对映选择性提供具有手性叔或季碳中心的所需偶联产物。