Hydrogenolysis of aryl halides by hydrogen gas and hydrogen transfer over palladium-supported catalysts

被引：26

作者：

Aramendia, MA ^{[1
]}

Borau, V ^{[1
]}

Carcía, IM ^{[1
]}

Jiménez, C ^{[1
]}

Marinas, A ^{[1
]}

Marinas, JM ^{[1
]}

Urbano, FJ ^{[1
]}

机构：

[1] Univ Cordoba, Fac Sci, Dept Organ Chem, E-14004 Cordoba, Spain

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE C-CHIMIE | 2000年 / 3卷 / 06期

关键词：

hydrogen transfer; hydrogenolysis; aryl halides; palladium catalysts;

D O I：

10.1016/S1387-1609(00)00143-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the present work, the influence of the hydrogenolysis method (hydrogen gas or hydrogen transfer) as well as of the nature of the hydrogen donor (HCOOK or 2-propanol) on the results found for hydrodehalogenation of aryl halides is discussed. Potassium formate hydrogen transfer competitive reactions confirm the strong adsorption of iodobenzene over the catalyst, which inhibits the adsorption of the other aryl halides and of the hydrogen donor. However, when using propan-2-ol as donor, iodobenzene is easily hydrodehalogenated and even fluorobenzene can be reduced. As for liquid-phase hydrogenolysis by hydrogen gas, results indicate that reactivity order (BrBz > ClBz > IBz > FBz) depends on both the C-X bond dissociation energy and the adsorption strength of the halobenzene. (C) 2000 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.

引用

页码：465 / 470

页数：6

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