Willem Van Brabandt, Robin Van Landeghem, N. Kimpe
Feb 11, 2006
Citations
0
Influential Citations
64
Citations
Journal
Organic Letters
Abstract
Reduction of 4-(haloalkyl)azetidin-2-ones with chloroalane (AlH2Cl) afforded new 2-(haloalkyl)azetidines in high yields. The latter compounds proved to be very useful starting materials for rearrangements toward stereospecifically defined five- and six-membered azaheterocycles, such as 3,4-cis-disubstituted pyrrolidines and piperidines. During these reactions, bicyclic azetidinium intermediates were formed which were ring opened by a variety of nucleophiles. Hereby, reactions proceeding via 1-azoniabicyclo[2.2.0]hexanes are reported for the first time.