Neopentylphosphines as effective ligands in palladium-catalyzed cross-couplings of aryl bromides and chlorides
作者:Lensey L. Hill、Joanna M. Smith、William S. Brown、Lucas R. Moore、Paul Guevera、Emily S. Pair、Jake Porter、Joe Chou、Christopher J. Wolterman、Raluca Craciun、David A. Dixon、Kevin H. Shaughnessy
DOI:10.1016/j.tet.2008.02.037
日期:2008.7
The use of neopentylphosphine ligands in the palladium-catalyzed Suzuki, Sonogashira, Heck, and Hartwig–Buchwald couplings of aryl bromides and chlorides are reported. Di-tert-butylneopentylphosphine (DTBNpP) provided highly active catalysts for the coupling of aryl bromides at mild temperatures. Trineopentylphosphine, an air-stable trialkylphosphine, gave inactive catalysts at room temperature, but
据报道,新戊基膦配体在钯催化的Suzuki,Sonogashira,Heck和Hartwig-Buchwald芳基溴化物和氯化物偶联反应中使用。二-叔-butylneopentylphosphine(DTBNpP)对于芳基溴的在温和的温度的耦合提供高活性催化剂。脯氨酰叔丁基膦,一种空气稳定的三烷基膦,在室温下可提供惰性催化剂,但在升高的温度下芳基氯化物的H–B胺化反应中表现出良好的活性。