Published March 29, 1999
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Catalytic Dehalogenation of Aryl Chlorides Mediated by Ruthenium(II) Phosphine Complexes
Abstract
The catalytic dechlorination of aryl chlorides performed by RuHCl(H_2)_2(PCy_3)_2 and RuH_2(H_2)_2(PCy_3)_2 in alcohols is rapid and complete within 1 h. The mechanism involves a transfer hydrogenation step with participation of the alcohol. The system exhibits significant functional group tolerance. The catalyst can be generated in situ from [RuCl_2(COD)]_x (COD = cyclooctadiene) and 2 equiv of phosphine (PCy_3 or P^iPr_3). Catalytic conversions are similar to those observed when an isolated precatalyst is used. Mechanistic considerations and the scope of the process are discussed.
Additional Information
© 1999 American Chemical Society. Received August 11, 1998. The National Science Foundation is gratefully acknowledged for support of this work.Attached Files
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