Metal-Reductant-Free Electrochemical Nickel-Catalyzed Couplings of Aryl and Alkyl Bromides in Acetonitrile
作者:Robert J. Perkins、Alexander J. Hughes、Daniel J. Weix、Eric C. Hansen
DOI:10.1021/acs.oprd.9b00232
日期:2019.8.16
attractive approach for the synthesis of complex molecules at both small and large scale, two barriers for large-scale applications have remained: the use of stoichiometric metalreductants and a need for amide solvents. In this communication, new conditions that address these challenges are reported. The nickel-catalyzed reductive cross-coupling of aryl bromides with alkyl bromides can be conducted in a
Enantiomerically Enriched α-Borylzinc Reagents by Nickel-Catalyzed Carbozincation of Vinylboronic Esters
作者:Chenlong Zhang、Weipeng Hu、Gabriel J. Lovinger、Jing Jin、Jingjia Chen、James P. Morken
DOI:10.1021/jacs.1c05274
日期:2021.9.8
In this paper is described a synthesis of enantiomerically enriched, configurationally stable organozinc reagents by catalyticenantioselective carbozincation of a vinylboronic ester. This process furnishes enantiomerically enriched α-borylzinc intermediates that are shown to undergo stereospecific reactions, producing enantioenriched secondary boronic ester products. The properties of the intermediate
Anti-Markovnikov Hydroalkylation of Styrene Derivatives via Hydrazones Catalyzed by Ru-PNP Complex
作者:Siyi Luo、Hanh D. M. Pham、Chen-Chen Li、Zihang Qiu、Ruofei Cheng、Rustam Z. Khaliullin、Chao-Jun Li
DOI:10.1021/acs.orglett.4c00610
日期:2024.4.19
Ru(II)-PNP complex demonstrated high activity in the anti-Markovnikov hydroalkylation of nonpolarized terminal alkenes via hydrazones. Hydrazone served as a carbanion equivalent to combine with the electrophilic alkene substrate upon activation by the ruthenium catalyst, forming a new C–C bond in a concerted pathway with N2 as the only theoretical byproduct. Experimental and computationalstudies suggested