Di-<i>tert</i>-butylneopentylphosphine (DTBNpP): An Efficient Ligand in the Palladium-Catalyzed α-Arylation of Ketones
作者:Steven M. Raders、Jessica M. Jones、Jeffrey G. Semmes、Steven P. Kelley、Robin D. Rogers、Kevin H. Shaughnessy
DOI:10.1002/ejoc.201402474
日期:2014.11
palladium(II) acetate provide an efficient catalytic system for the α-arylation of ketones. Aryl bromides were coupled with ketones using 0.25–0.5 mol-% Pd(OAc)2/DTBNpP in toluene at 50 °C, whereas aryl chlorides required a higher catalyst loading (0.5–2.0 mol-%) and a higher temperature (80 °C). Coupling of 2-bromophenol with ketones using the Pd/DTBNpP system provides an efficient route for the synthesis
二叔丁基新戊基膦 (DTBNpP) 和醋酸钯 (II) 为酮的 α-芳基化提供了有效的催化体系。在 50 °C 的甲苯中使用 0.25–0.5 mol-% Pd(OAc)2/DTBNpP 将芳基溴与酮偶联,而芳基氯需要更高的催化剂负载量 (0.5-2.0 mol-%) 和更高的温度 (80 °C) C)。使用 Pd/DTBNpP 系统将 2-溴苯酚与酮偶联为苯并呋喃的合成提供了有效途径。