Single-Electron Transmetalation: Synthesis of 1,1-Diaryl-2,2,2-trifluoroethanes by Photoredox/Nickel Dual Catalytic Cross-Coupling
作者:DaWeon Ryu、David N. Primer、John C. Tellis、Gary A. Molander
DOI:10.1002/chem.201504079
日期:2016.1.4
method for the cross‐coupling of benzylic α‐trifluoromethylated alkylboron reagents with (hetero)aryl bromides is achieved through application of a photoredox/nickel dual catalytic system. The harsh conditions and high temperatures required by conventional Suzuki‐coupling protocols are avoided by exploitation of an odd‐electron pathway that permits room temperature transmetalation of these recalcitrant
将氟化亚基掺入有机骨架的新方法在制药,农业化学和材料科学应用中很重要。在本文中,第一种将苄基α-三氟甲基化烷基硼试剂与(杂)芳基溴化物交叉偶联的方法是通过应用光氧化还原/镍双催化体系实现的。常规铃木耦合方案所要求的苛刻条件和高温可通过利用奇数电子途径来避免,这些奇数电子途径可在室温下对这些顽calc性试剂进行重金属化。该方法代表了合成不对称1,1-二芳基-2,2,2,2-三氟乙烷的第一条直接且通用的路线,从而可以有效地进入先前未开发的化学空间。