Jp. Dulcere et al., SYNTHESIS AND REACTIVITY OF ALLENYLVINYL CYCLOALK-2-ENYL ETHERS, Journal of the Chemical Society, Chemical Communications, (12), 1993, pp. 1038-1039
Cohalogenation of alkenes 6 by N-bromosuccinimide (NBS) in 3-methylpen
t-2-en-4-yn-1-ol provides beta-bromo-3-methylpent-2-en-4-ynyl ether 7
precursors of 3-(penta-1,3,4-trienyloxy)cycloalkenes 9 which react che
mo- and regio-selectively with NBS in methanol to give bromovinyl acet
als 10.