Benzothiazole derivative 14B with conjugate expansion by (4-aminophenyl) ethynyl group is synthesized. The compound exhibits higher fluorescence quantum yield, low cytotoxicity, and strong bright green fluorescence during confocal cell imaging.
An efficient system for the Pd-catalyzed cross-coupling of amides and aryl chlorides
作者:Brett P. Fors、Karin Dooleweerdt、Qingle Zeng、Stephen L. Buchwald
DOI:10.1016/j.tet.2009.04.096
日期:2009.8
A catalyst based on a new biarylphosphine ligand (3) for the Pd-catalyzed cross-coupling reactions of amides and aryl chlorides is described. This system shows the highest turnover frequencies reported to date for these reactions, especially for aryl chloride substrates bearing an ortho substituent. An array of amides and aryl chlorides were successfully reacted in good to excellent yields. (C) 2009 Elsevier Ltd. All rights reserved.