N-(Alkylidene or arylidene)-2-substituted-2-propenylamines were regios
pecifically functionalized into novel N-(alkylidene or dene)-2-alkoxy-
3-bromo-2-substituted-propylamines, which were proven to be excellent
sources for 3-alkoxyazetidines through sodium borohydride reduction of
the imino bond and subsequent intramolecular nucleophilic substitutio
n.