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Synthesis 2002(3): 0317-0319
DOI: 10.1055/s-2002-20027
DOI: 10.1055/s-2002-20027
SHORTPAPER
© Georg Thieme Verlag Stuttgart · New York
Synthesis of β-Keto Esters by Carbonylation of Halomethylketones
Further Information
Received
26 October 2001
Publication Date:
28 July 2004 (online)
Publication History
Publication Date:
28 July 2004 (online)
Abstract
A number of β-keto esters were synthesized by Pd-catalyzed carbonylation of halomethylketones in the presence of tributylamine in 68-86% yields. The reaction is completed in 2 hours at 110 °C and 10 bar CO pressure. Chloromethylketones are carbonylated selectively while 2-bromoacetophenone is partly reduced to acetophenone as a byproduct. The reaction can be carried out at atmospheric pressure though the rate stays low. The reaction mechanism is discussed.
Key words
halomethylketones - β-keto esters - carbonylation - palladium - catalysis
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