Chemo- and Regioselective C(sp<sup>3</sup>)H Arylation of Unactivated Allylarenes by Deprotonative Cross-Coupling
作者:Nusrah Hussain、Gustavo Frensch、Jiadi Zhang、Patrick J. Walsh
DOI:10.1002/anie.201309084
日期:2014.4.1
Transmetalation of the resulting allyllithium intermediate to LPdAr(Br) and reductive elimination provide the 1,1‐diarylprop‐2‐enes, which are not accessible by the Heck reaction. The regioselectivity in this deprotonative cross‐coupling process is catalyst‐controlled and very high.
Nickel-Catalyzed Direct Coupling of Allylic Alcohols with Organoboron Reagents
作者:Gaonan Wang、Yi Gan、Yuanhong Liu
DOI:10.1002/cjoc.201800237
日期:2018.10
The direct coupling of allylicalcohols with arylboronic acids or their derivatives catalyzed by Ni(cod)2 in the presence of a catalytic amount of base has been developed. A wide variety of allylic substrates or arylboronic acids turned out to be applicable to this catalytic system. The present method does not require the use of ligands for stabilizing the nickel catalyst in most cases or additional
Unsymmetrical imidazoliumsalts, each having one nitrogen atom (N1) substituted by a cavity-shaped TPR group (TPR = 2,8,14,20-tetrapentylresorcinaren-5-yl), were tested in situ as proligands for the copper-catalysedallylic arylation of cinnamyl bromide with arylmagnesium halides. The catalytic systems produced mixtures of linear (l) and branched (b) arylated compounds in variable proportions, with