Palladium-<i>meta</i>-Terarylphosphine Catalyst for the Mizoroki–Heck Reaction of (Hetero)Aryl Bromides and Functional Olefins
作者:Daniel Weiliang Tay、Howard Jong、Yee Hwee Lim、Wenqin Wu、Xinying Chew、Edward G. Robins、Charles W. Johannes
DOI:10.1021/acs.joc.5b00386
日期:2015.4.17
a powerful catalyst system for the Mizoroki–Heck reaction. Using high-throughput screening (HTS) methodology, DMF and NaHCO3 were rapidly identified as the most effective solvent and base pair for the cross-coupling catalysis of challenging and industrially valuable substrates including highly electron-rich heteroaryl bromides and unactivated olefins. Unprotected functional groups were well tolerated
Cy * Phine的演化间-叔芳基膦配体结构最近被证明是关键特性,在钯催化的无铜Sonogashira应用中表现出出色的性能。在此,Pd-Cy * Phine的组合同样被证明是Mizoroki-Heck反应的强大催化剂体系。使用高通量筛选(HTS)方法,DMF和NaHCO 3被迅速鉴定为最具挑战性和工业价值的底物(包括高度电子富集的杂芳基溴化物和未活化的烯烃)的交叉偶联催化的最有效溶剂和碱基对。使用低催化剂量可以很好地耐受未保护的官能团,并且简单的操作方案可产生优异的收率(高达99%),并且具有前所未有的底物多样性。Pd-Cy * Phine系统的性能远远优于许多最先进的商业替代产品,这证明了其作为下一代交叉偶联催化剂的潜力。