Participation of sulphonamide nitrogen in the rearrangement of the 2-azabicyclo[2.2.2]octane skeleton: an efficient synthesis of the 6-azabicyclo[3.2.1]octan-4-one system
Abstract
Treatment of the 2-azabicyclo[2.2.2]oct-5-ene imino Diels–Alder adduct (2) with N-bromosuccinimide in aqueous dimethoxyethane gives the rearranged bromohydrin (4a), whose structure is confirmed by X-ray crystallographic analysis, and which serves as a precursor to the 6-azabicyclo[3.2.1]octane-4-one (7).