Iron-catalyzed cross-coupling of heteroaromatic tosylates with alkyl and aryl Grignard reagents
作者:Xu Chen、Zheng-Jun Quan、Xi-Cun Wang
DOI:10.1002/aoc.3289
日期:2015.5
An Fe(III)‐catalyzedcross‐coupling of N‐heteroaromatic tosylates with aryl and alkyl Grignard reagents is presented. The reaction proceeds at −20°C to room temperature with short reaction time (15–30 min.), and the corresponding products are obtained with moderate to high yields. In particular, low‐cost and abundantly available FeCl3 or Fe(acetylacetonate)3 catalyze the reaction without other special
Chemo-Controlled Cross-Coupling of Di(hetero)aryl Disulfides with Grignard Reagents: CC<i>vs.</i>CS Bond Formation
作者:Bao-Xin Du、Zheng-Jun Quan、Yu-Xia Da、Zhang Zhang、Xi-Cun Wang
DOI:10.1002/adsc.201400980
日期:2015.4.13
A general protocol for the chemoselectivity‐controlled CC and CS coupling reactions of di(hetero)aryldisulfides with Grignardreagents catalyzed by ferrocene and palladium acetate has been developed. Ferrocene favored the formation of CS coupled products at low temperature, whereas CCbond couplings were favored when palladium acetate was used. All the reactions proceeded with excellent chemoselectivity