The full scope (30 examples) of the radical bromoallylation of alkynes using allyl bromides was studied. In this reaction, bromine radical adds to alkynes to form vinyl radicals, which then undergo an SH2′ reaction with allyl bromides to produce good yields of 1-bromo-1,4-dienes with the liberation of a bromine radical, which creates a radical chain. The sp2-carbon–bromine bond of the product dienes was further functionalized via cross-coupling and carbonylation reactions.
- Allyl bromides
- Radical reaction