A simple approach to the fluorinated 1,5-benzoxazepine ring system is
described. By reacting commercially accessible aminophenols 1 and the
trifluoroacetylvinyl ether 2, high yields of enaminones 3 were obtaine
d. Functionalization of methyl group of compounds 3 gave rise to diene
amines 4 that were cyclized in acidic environment to benzoxazepine der
ivatives 5.