Palladium-Catalyzed Direct C–H Alkenylation with Enol Pivalates Proceeds via Reversible C–O Oxidative Addition to Pd(0)
作者:Nahiane Pipaón Fernández、Gregory Gaube、Kyla J. Woelk、Mathias Burns、Damian P. Hruszkewycz、David C. Leitch
DOI:10.1021/acscatal.2c01305
日期:2022.6.17
We report a directtandem C–O/C–H activation approach to C–Cbond formation using palladium catalysis. This reaction combines C–O oxidative addition at enol pivalates with concerted metalation–deprotonation of functionalized heterocycles to achieve base-free directC–H alkenylation. Preliminary mechanistic studies revealed that the C–O oxidative addition to Pd(0) is reversible under these conditions
Suzuki-Miyaura coupling of heteroaryl boronic acids and vinyl chlorides
作者:Ashish Thakur、Kainan Zhang、Janis Louie
DOI:10.1039/c1cc15990a
日期:——
A protocol for the Suzuki-Miyauracoupling of heteroaryl boronic acids and vinyl chlorides that minimizes protodeboronation is described. A combination of catalytic amounts of Pd(OAc)(2) and SPhos in conjunction with CsF in isopropanol effectively affords a variety of coupled products. Surprisingly, a dramatic temperature dependence in product selectivity was observed.