期刊
INORGANICA CHIMICA ACTA
卷 518, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2020.120214
关键词
Cross-coupling; Aryl amination; Palladium catalysis; Phosphane ligands; Palladacycles
资金
- MICINN [CTQ2017-82893-C2-2-R]
- FEDERUniversidad de Sevilla [US-1262266]
- Universidad de Sevilla (V Plan Propio de Investigacion)
The study presented the synthesis and characterization of neutral and cationic N-methyl- and N-phenyl-2-aminobiphenyl methanesulfonate palladacycles stabilized with dialkylterphenyl phosphines. By selecting different phosphine ligands, different coordination modes and structures of complexes were obtained. The most efficient precatalyst, [Pd(N-methyl-2-aminobiphenyl)L4](OMs), was identified for facilitating the coupling of aryl chlorides with secondary and primary amines and indoles.
Neutral and cationic N-methyl- and N-phenyl-2-aminobiphenyl methanesulfonate palladacycles stabilized with dialkylterphenyl phosphanes have been prepared and characterized. Neutral structures are favored with the less bulky phosphane PMe2ArXyl2, L1, while more sterically demanding ligands PiPr(2)Ar(Xyl2), L3, and PCyp(2)Ar(Xyl2) (Cyp = cyclopentyl), L4, lead to cationic complexes in which the phosphane exhibits a bidentate kappa(1)-P,eta(1)-C-arene coordination mode involving one of the ipso carbon atoms of a flanking terphenyl aryl ring. The complexes were evaluated for activity in C-N cross-coupling reactions and [Pd(N-methyl-2-aminobiphenyl)L4](OMs) (OMs = mesylate) was identified as the most efficient precatalyst, facilitating the coupling of aryl chlorides with secondary and primary amines and indoles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据