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Atom-Transfer Radical Addition (ATRA) and Cyclization (ATRC) Reactions Catalyzed by a Mixture of [RuCl2Cp*(PPh3)] and Magnesium

✍ Scribed by Katrin Thommes; Burçak Içli; Rosario Scopelliti; Kay Severin

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
192 KB
Volume
13
Category
Article
ISSN
0947-6539

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✦ Synopsis

Abstract

A new catalytic procedure for atom‐transfer radical addition (ATRA) and cyclization (ATRC) reactions is described. The combination of the ruthenium(III) complex [RuCl~2~Cp*(PPh~3~)] (Cp*: pentamethylcyclopentadienyl) with magnesium allows these reactions to be performed under mild conditions with high efficiency. In most cases, the catalyst concentrations required are significantly lower than those used in previously reported procedures. It is suggested that magnesium acts as a reducing agent that generates and regenerates the catalytically active ruthenium(II) species. The precatalyst [RuCl~2~Cp*(PPh~3~)] has been analyzed by X‐ray crystallography.

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