Abstract
Potassium alkynyltrifluoroborates and potassium (2-phenyl)vinyltrifluoroborates react with N-3-butenyl-(2,2-dichloro-1-propylidene)amine in the presence of BF 3·Et 2O as a Lewis acid to synthesize rearranged Mannich products. The reaction starts with a cationic 2-aza-Cope rearrangement of the imine, followed by the Lewis acid promoted borono-Mannich-type reaction on the rearranged imine to result in a new class of functionalized N-homoallylamines.
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