P. Stanetty et al., A NOVEL HETERO-DIELS-ALDER APPROACH TOWARDS PERHYDROQUINOLINONES BEARING AN ANGULAR METHYL-GROUP, Tetrahedron, 54(5-6), 1998, pp. 875-894
The title compounds 9-11 were synthesized by a hetero Diels-Alder reac
tion using the sterically demanding diene 2 as a new building block. T
he effect of commonly used Lewis acids and the substitution pattern of
various imines 5 on both the mechanism and the diastereoselectivity o
f the reaction with the diene is discussed and compared with data obta
ined by ab initio calculations. (C) 1997 Elsevier Science Ltd. All rig
hts reserved.