SCHEDULED MAINTENANCE
Alkylation of the allenic acid fluoride (1) is a regiospecific reaction which depends on the nature of the alkylating agent; whereas treatment of (1) with lithium dimethylcopper affords the 20-vinylic methylated 22-keto-steroid (3), reaction with dimethylcadmiu provides a mixture of isomeric allenyl methyl ketones (5a) and (5b).
P. Crabbé and E. Velarde, J. Chem. Soc., Chem. Commun., 1972, 241 DOI: 10.1039/C39720000241
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