Santelli-Rouvier C, Lefrère S, Santelli M. Preparation of delta-Chloro-alpha-allenyl Ketones by Acylation of 3-Buten-1-ynes.
J Org Chem 1996;
61:6678-6684. [PMID:
11667540 DOI:
10.1021/jo9604090]
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Abstract
AlCl(3)-mediated acylation of 3-buten-1-yne derivatives with acyl chlorides yields a mixture of 5-chloro-2,3-pentadienones and 3-chloro-2,4-pentadienones. The proportion of allenyl ketones vs conjugated dienic ketones depends on the substitution pattern of the starting enyne. Acylation of 5-acetoxy-3-buten-1-ynes leads to the corresponding allenyl ketones (6-acetoxy-5-chloro-2,3-pentadienones).
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