The reaction of anils with conjugated dienes
Abstract
2-(4-Chlorophenylimino)-1-phenylethanone (1) or its adducts with alcohols (2) react with butadiene, cyclopentadiene, cyclohexa-1,3-diene, or cycloheptatriene under BF3 catalysis to give the tetrahydroquinoline derivatives (11), (8a), (12), and (13), respectively.