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Diallylated compounds 1,2,4,5 available via the reactions of triallyl- or trimethallylborane with nitriles, lactams and aromatic nitrogen heterocycles present convenient starting materials for the preparation of diverse N-heterocycles.1 Intramolecular amination, various cyclization reactions including ring-closing metathesis were successfully applied for the creaction of the final heterocycles.2,3 From bicyclic boranes 3, the corresponding chiral N,- S,- and Se-heterocycles were prepared.Syntheses of alkaloids (±)-Hippocasine and (±)-Cephalotaxine will be also presented.4