代表的钯络合物ħ etero一汤姆取代小号econdary p hosphine ø西德(HASPO)preligands合成并充分表征,包括X射线晶体结构分析。重要的是,这些定义明确的络合物可作为Kumada-Corriu芳基,烯基乃至杂芳基甲苯磺酸酯交叉偶联反应的高效催化剂。特别是,由廉价的PinP(O)H衍生的空气稳定型催化剂显示出极高的催化效力,这导致在极低的反应条件下,在足够宽泛的反应条件下,低催化剂负载下的交叉偶联。
Pd-catalyzed protecting-group-free cross-couplings of iodophenols with atom-economic triarylbismuth reagents
作者:Maddali L.N. Rao、Suresh Meka
DOI:10.1016/j.tetlet.2019.151512
日期:2020.2
An efficient protocol for the protecting-group-free synthesis of unsymmetrical hydroxybiaryls via the Pd-catalyzedcross-couplings of unprotected iodophenols with triarylbismuth reagents is described. The presented protocols exhibits good to high yields of hydroxybiaryls.