Facile hydrodehalogenation with hydrogen and palladium/carbon catalyst under multiphase conditions

CA Marques, M Selva, P Tundo

Index: Marques, Carlos Alberto; Selva, Maurizio; Tundo, Pietro Journal of Organic Chemistry, 1993 , vol. 58, # 19 p. 5256 - 5260

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Citation Number: 93

Abstract

A multiphase system consisting of a hydrocarbon solvent, a strong alkaline solution, and a quaternary onium salt, in the presence of a Pd/C catalyst with hydrogen at atmospheric pressure, allows the rapid and progressive displacement of the chlorine atoms from polyhalogenated benzenes. The onium salt in this case constitutes a third liquid phase in which the reaction takes place. At 50" C, 1, 2, 4, 5-tetrachlorobenzene is reduced to ...