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Synthesis 2008(6): 887-890
DOI: 10.1055/s-2008-1032193
DOI: 10.1055/s-2008-1032193
PAPER
© Georg Thieme Verlag Stuttgart · New York
Acetylation of N-Heteroaryl Bromides via PdCl2/(o-tolyl)3P Catalyzed Heck Reactions
Further Information
Received
24 October 2007
Publication Date:
28 February 2008 (online)
Publication History
Publication Date:
28 February 2008 (online)
Abstract
A new user-friendly and convenient method for the acetylation of N-heteroaryl bromides is described. This process is based on the palladium-catalyzed olefination of an N-heteroaryl bromide with butyl vinyl ether, followed by acid hydrolysis of the intermediate heteroaryl vinyl ether in situ. Isopropanol at 85 °C, in the presence of K3PO4·3H2O (2 equiv), PdCl2 (2 mol%) and (o-tolyl)3P (4 mol%), provided the best conditions, giving yields of N-heteroaryl bromides up to 75%.
Key words
acetylation - butyl vinyl ether - isopropanol - N-heteroaryl bromides
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