A convenient approach to the highly reactive allylic dihaloboranes and diallyl(chloro)borane based on exchange reactions between BHal 3 (Hal = Cl, Br) and allylic triorganoboranes (allyl, cinnamyl and 2-methylenecyclobutane derivatives) has been developed. The compounds thus generated readily react with terminal alkenes and acetylenes to form the corresponding cis-1,2-allylboration products. These products were isolated by standard techniques and transformed
Reductive allylation of certain nitrogen heterocycles (indoles, isoquinoline, 4-vinylpyridine, and lactams) with allylic boron and zinc derivatives is presented.
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