Unusual reactions of N-allylic difluoroenamines under thermal conditions.
N-Allylic difluoroenamines exhibited unusual behaviors under thermal conditions; N-allyl difluoroenamines in refluxing xylene afforded not only aza-Claisen rearrangement products, but also 2-azabicyclo[2.1.1]hexanes, whose formation could be explained via intramolecular [2+2]-cycloaddition, whilst N-prenyl difluoroenamine underwent an ene reaction to give the pyrrolidine as a sole product.
Amii
Hideki
H
Department of Applied Chemistry, Faculty of Engineering, Okayama University, Okayama 700-8530, Japan.
Ichihara
Yutaka
Y
Nakagawa
Takashi
T
Kobayashi
Takeshi
T
Uneyama
Kenji
K