Pd-Catalyzed Suzuki coupling reactions of aryl halides containing basic nitrogen centers with arylboronic acids in water in the absence of added base
作者:Zhao Li、Carol Gelbaum、Zachary S. Campbell、Paul C. Gould、Jason S. Fisk、Bruce Holden、Arvind Jaganathan、Gregory T. Whiteker、Pamela Pollet、Charles L. Liotta
DOI:10.1039/c7nj03567e
日期:——
The Pd-catalyzed Suzuki coupling reactions of a series of aryl chlorides and aryl bromides containing basic nitrogen centers with arylboronicacids in water in the absence of added base are reported. The reactions proceed either partially or entirely under acidic conditions. After surveying twenty-two phosphorus ligands, high yields of products were obtained with aryl chlorides only when a bulky ligand
作者:Jian-Jun Dai、Chi Fang、Bin Xiao、Jun Yi、Jun Xu、Zhao-Jing Liu、Xi Lu、Lei Liu、Yao Fu
DOI:10.1021/ja404217t
日期:2013.6.12
A copper-promoted trifluoromethylation reaction of aromatic amines is described. This transformation proceeds smoothly under mild conditions and exhibits good tolerance of many synthetically relevant functional groups. It provides an alternative approach for the synthesis of trifluoromethylated arenes and heteroarenes. It also constitutes a new example of the Sandmeyer reaction.
Here we report a silver-mediated trifluoromethoxylation of (hetero)aryldiazonium tetrafluoroborates by converting an aromatic amino group into an OCF3 group. This method, which can be considered to be a trifluoromethoxylation variation of the classic Sandmeyer-type reaction, uses readily available aryl and heteroaromatic amines as starting materials and AgOCF3 as trifluoromethoxylating reagents. The