Regioselective homogeneous hydrogenation of quinoline by use of pyrazolyl borate ligand and transition metal complexes as a precatalyst

被引：38

作者：

Alvarado, Y

Busolo, M

López-Linares, F

机构：

[1] Intevep SA, Res & Technol Support Ctr Petr Venezuela, Caracas 1070A, Venezuela

[2] La Univ Zulia, Fac Ciencias, Inorgan Chem Lab, Maracaibo, Venezuela

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1999年 / 142卷 / 02期

关键词：

homogeneous catalyst; quinoline hydrogenation; tris-pyrazolyl borates ligands;

D O I：

10.1016/S1381-1169(98)00297-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In situ regioselective quinoline hydrogenation with transition metal complexes, such as [Rh(COD)Cl](2), [Lr(COD)Cl](2), [Ir(COE)(2)Cl](2) and RuCl2(CH3CN)(4) stabilized with the ligands tris-pyrazolyl berates Tp = NaHB(pz)(3) and Tp* = KHB(pz*)(3) (pz* = 3,5 -dimethylpyrazolyl), via one pot reaction is described. The results are compared to those carried out with the complex TpIr(Ethylene)(2). The system formed by the complex [Rh(COD)Cl](2) with the ligand Tp is the most efficient and regioselective catalyst precursor for this reaction. Influence of the type of Tp ligand in the activity of this system was observed. The complex TpIr(Ethylene)(2) shows catalytic activity in the hydrogenation, with strong influence of temperature, H-2 pressure and a polar solvent such as MeOH favors the formation of the active species. (C) 1999 Elsevier Science B.V. All rights reserved.

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页码：163 / 167

页数：5

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