Alkylation of cyclic ketones and α-methoxycarbonyl ketones with 4-iodo-2-trimethylstannylbut-1-ene and/or 5-iodo-2-trimethylstannylpent-1-ene, and subsequent (Ph3P)4Pd-catalysed cyclization of the enol trifluoromethanesulphonates derived form the alkylation products, from the basis of new annulation sequences which result in the formation of diene systems.
E. Piers, R. W. Friesen and B. A. Keay, J. Chem. Soc., Chem. Commun., 1985, 809 DOI: 10.1039/C39850000809
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