Synthesis of biphenyl-based arsine ligands by Suzuki–Miyaura coupling and their application to Pd-catalyzed arsination
作者:Paula M. Uberman、Mario N. Lanteri、Sol C. Parajón Puenzo、Sandra E. Martín
DOI:10.1039/c1dt10207a
日期:——
A versatile and efficient approach for the synthesis of new biphenyl-based arsine ligands, by a Pd-catalyzed arsination to introduce the -AsPh2 moiety, and then a SuzukiâMiyaura cross-coupling for biaryl construction is reported. By Pd-catalyzed arsination with n-Bu3SnAsPh2 (1), (2-bromophenyl)diphenylarsine (2, 83%) was obtained. The SuzukiâMiyaura reaction between the bromoarsine 2 and aryl boronic acids bearing different substituents provided biarylarsine ligands (80â99%). The efficiency of catalysts derived from the new biarylarsine ligands was evaluated in the Pd-catalyzed arsination with perfluoroalkyl iodides (RfI). Outstanding activities of catalysts derived from Pd/methoxybiarylarsine ligands were found in this coupling reaction affording perfluoroalkyl arsines in very good yields (57â100%).
报道了一种合成新型联苯基胂配体多功能且高效的方法,该方法通过Pd催化的胂化反应引入-AsPh2基团,然后进行Suzuki-Miyaura交叉偶联反应构建联芳基结构。通过Pd催化的胂化反应与n-Bu3SnAsPh2 (1),得到了(2-溴苯基)二苯基胂(2, 83%)。在含有不同取代基的芳基硼酸与溴胂2之间的Suzuki-Miyaura反应提供了联芳基胂配体(80-99%)。通过Pd催化胂化反应与全氟烷基碘(RfI)评估了源自新联芳基胂配体的催化剂效率。发现源自Pd/甲氧基联芳基胂配体的催化剂在这一偶联反应中具有出色的活性,生成了收率非常高的全氟烷基胂(57-100%)。