carbonyl group, cyano group) in an alkyl halide facilitates its cross-coupling reaction with various diorganozincs in the presence of Ni(acac)(2) (7.5-10 mol % in THF/NMP mixtures). These results were used to develop a new general cross-coupling reaction between functionalized diorganozincs and alkyliodides using m- or p-trifluoromethylstyrene as a reaction promotor and Ni(acac)(2) as a catalyst (7.5-10
Zn-Mediated, Pd-Catalyzed Cross-Couplings in Water at Room Temperature <i>Without</i> Prior Formation of Organozinc Reagents
作者:Arkady Krasovskiy、Christophe Duplais、Bruce H. Lipshutz
DOI:10.1021/ja906803t
日期:2009.11.4
Mix in water, stir. That is all that is required in this new approach to sp(3)-sp(2) cross-couplings between an alkyl iodide and an aryl bromide, both potentially bearing functionality. They react under catalysis by Pd(0) in the presence of zinc powder, aided by a nonionic amphiphile, to give the alkylated aromatic. No organic solvents and no heating; just add water.
Cu(I)-catalyzed substitution reactions of activated vinyl triflates with functionalized organozinc reagents
作者:Bruce H. Lipshutz、Randall W. Vivian
DOI:10.1016/s0040-4039(99)00355-x
日期:1999.4
Treatment of a mixed, functionalized dialkylzinc species with catalytic amounts of CuCN . 2LiCl produces a reagent which readily displaces an activated vinyl triflate in high yields. (C) 1999 Elsevier Science Ltd. All rights reserved.