Mono-and dinuclear cyclopalladates as catalysts for Suzuki-Miyaura cross-coupling reactions in predominantly aqueous media

被引：16

作者：

Babu, G. Narendra ^{[1
]}

Pal, Samudranil ^{[1
]}

机构：

[1] Univ Hyderabad, Sch Chem, Hyderabad 500046, Andhra Pradesh, India

来源：

TETRAHEDRON LETTERS | 2017年 / 58卷 / 10期

关键词：

Cyclopalladates; Mono-and dinuclear; Suzuki-Miyaura cross-coupling; Aqueous media; FREE SONOGASHIRA REACTIONS; ROOM-TEMPERATURE; ARYL CHLORIDES; NEAT WATER; PALLADIUM NANOPARTICLES; EFFICIENT CATALYST; AEROBIC CONDITIONS; ARYLBORONIC ACIDS; LIGANDS SYNTHESES; COMPLEXES;

D O I：

10.1016/j.tetlet.2017.01.089

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Suzuki-Miyaura cross-coupling reactions of aryl halides with arylboronic acids were performed in predominantly aqueous media employing two mono-and two dinuclear cyclopalladated complexes as catalysts. These complexes are [Pd(HL)Cl] (I), [Pd(L)(PPh3)] (II), [Pd-2(y-dppb)(L)(2)] (III) and [Pd-2(mu-dppf)(L)2] (IV); where H2L, dppb and dppf represent 4-methoxy-N'-(mesitylidene)benzohydrazide, 1,4-bis (diphenylphosphino)butane and 1,1'-bis(diphenylphosphino)ferrocene, respectively. The reactions were conducted using potassium carbonate as base in presence of tetrabutylammonium bromide (TBAB) at 70/90 degrees C in dimethylformamide-water (1:20) mixture. Among the four catalysts used, the dinuclear complex IV turned out to be the most effective and afforded moderate to excellent yields with broad substrate scope. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1000 / 1005

页数：6

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