镍催化的交叉亲电偶联最近已成为形成 CC 键的高效实用方法。通过将此过程与成熟的 π-π 偶联化学相结合,开发了一种合成四取代烯烃的新方法。该过程依赖于使用氯硅烷作为产生反应性乙烯基镍中间体的手段,这些中间体能够与卤代烷进行还原性交叉亲电偶联。该方法不仅可以生成高度取代的烯丙醇衍生物,而且不需要化学计量的有机金属亲核试剂,与以前开发的方法相比,范围和官能团耐受性大大提高。
Regioselective palladium-catalyzed cross-coupling reactions in the synthesis of novel 2,3-disubstituted thiophene derivatives
作者:Raquel Pereira、Beatriz Iglesias、Angel R de Lera
DOI:10.1016/s0040-4020(01)00764-5
日期:2001.9
A reactivity optimization study of the palladium-catalyzed cross-coupling reactions of 2,3-dibromothiophene and organometallicreagents has been conducted. Regioselectivecoupling at the C2 position, accomplished most notably by Suzuki coupling, was combined with a Stille reaction at C3 using Fu's modification, to afford the 2,3-disubstituted thiophene derivatives.
Synthesis of Tetrasubstituted Alkenes by Tandem Metallacycle Formation/Cross-Electrophile Coupling
作者:Kirk W. Shimkin、John Montgomery
DOI:10.1021/jacs.8b04637
日期:2018.6.13
Nickel-catalyzed cross-electrophile couplings have recently emerged as highly effective and practical methods for the formation of C-C bonds. By merging this process with well-established π-π coupling chemistry, a new method for the synthesis of tetrasubstituted alkenes has been developed. The procedure relies on the use of chlorosilanes as a means of generating reactive vinylnickel intermediates,
镍催化的交叉亲电偶联最近已成为形成 CC 键的高效实用方法。通过将此过程与成熟的 π-π 偶联化学相结合,开发了一种合成四取代烯烃的新方法。该过程依赖于使用氯硅烷作为产生反应性乙烯基镍中间体的手段,这些中间体能够与卤代烷进行还原性交叉亲电偶联。该方法不仅可以生成高度取代的烯丙醇衍生物,而且不需要化学计量的有机金属亲核试剂,与以前开发的方法相比,范围和官能团耐受性大大提高。
δ-C–H Mono- and Dihalogenation of Alcohols
作者:Alastair N. Herron、Dongxin Liu、Guoqin Xia、Jin-Quan Yu
DOI:10.1021/jacs.9b13171
日期:2020.2.12
Alkoxy radicals have long been known to enable remote C-H functionalization via 1,5-hydrogen atom abstraction. However, methods for their generation traditionally have relied upon highly oxidizing metals, ultraviolet radiation, or preformed peroxide intermediates, which has prevented the development of many desirable transformations. Herein we report a new bench-stable precursor that decomposes to