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A convenient and general ruthenium-catalyzed transfer hydrogenation of nitro- and azobenzenes.

Chemistry (Weinheim an der Bergstrasse, Germany) (2011-11-25)
Rajenahally V Jagadeesh, Gerrit Wienhöfer, Felix A Westerhaus, Annette-Enrica Surkus, Henrik Junge, Kathrin Junge, Matthias Beller
ABSTRACT

An easily accessible in situ catalyst composed of [{RuCl(2)(p-cymene)}(2)] and terpyridine has been developed for the selective transfer hydrogenation of aromatic nitro and azo compounds. The procedure is general and the selectivity of the catalyst has been demonstrated by applying a series of structurally diverse nitro and azo compounds (see scheme).

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
p-Cymene, 99%
Sigma-Aldrich
p-Cymene, ≥97%, FG
Supelco
p-Cymene, analytical standard
Supelco
p-Cymene, certified reference material, TraceCERT®