Buchwald-Hartwig Amination of Aryl Chlorides Catalyzed by Easily Accessible Benzimidazolyl Phosphine-Pd Complexes
作者:Chau So、Fuk Kwong、Kin Chung、Shun Wong、Chi Luk、Zhongyuan Zhou、Chak Lau
DOI:10.1055/s-0031-1290666
日期:2012.5
This study describes the efficacy of benzimidazolyl phosphine ligands, which are easily synthesized from inexpensive and commercially available o-phenylenediamine, 2-bormobenzoic acid, and chlorophosphines, in the Buchwald-Hartwig amination of aryl chlorides. Primary and secondary aromatic/aliphatic amines are effective substrates in this catalytic system. Functional groups such as keto and esters are also compatible. The catalyst loading can be reduced to 0.1 mol% Pd.
本研究描述了从廉价且市售的邻苯二胺、2-溴苯甲酸和氯膦化合物容易合成的苯并咪唭基膦配体在Buchwald-Hartwig芳基氯化物胺化反应中的效能。在该催化体系中,伯和仲芳香/脂肪胺是有效的底物。酮和酯等功能团也能兼容。催化剂负载量可降至0.1 mol% Pd。