Showing papers by "Keiji Maruoka published in 1991"

Functional Group Transformations via Carbonyl Derivatives

Abstract: The Beckmann rearrangement is the skeletal rearrangement of aldoximes and ketoximes in the presence of certain acids, including Lewis acids, to give amides or lactams. Since the first discovery of this rearrangement by Beckmann in 1886,1 successive investigations have largely clarified its scope, reaction mechanism, and the stereochemical configurations of the oximes employed. Accordingly, the Beckmann rearrangement has become an increasingly important synthetic tool in organic chemistry and it has been reviewed several times.2–6 It is one of the most reliable ways of incorporating the nitrogen atom efficiently into both acyclic and alicyclic systems, thereby providing a powerful method for a variety of natural product syntheses.

Organoborane‐Catalyzed Hydroalumination of Terminal Allenes.

Abstract: Organoborane-catalyzed hydroalumination of terminal allenes with dichloroaluminum hydride gives rise to the corresponding allylaluminum compounds under mild conditions with high regioselectivity.