S. Bohm et al., STERICALLY CROWDED HETEROCYCLES .9. NEW ALPHA,BETA-UNSATURATED KETONES CONTAINING IMIDAZO[1-2-A]QUINOLINE, IMIDAZO[2,1-A]-ISOQUINOLINE, BENZO[H]IMIDAZO[1,2-A]QUINOLINE AND IMIDAZO[1,2-A]-1,10-PHENANTHROLINE MOIETIES, Collection of Czechoslovak Chemical Communications, 62(10), 1997, pp. 1599-1611
(2-phenylimidazo[1,2-a]heteroaryl)prop-2-en-1-ones 2-6 and isomeric et
eroaryl-3,5-diphenylpyrrol-2-yl]phenylmethanones 17-20 were prepared b
y the ferricyanide oxidation of quaternary pyridinium salts 12-16. Axi
al chirality and helicity of the molecules of 4 and 6 are discussed us
ing various energy data obtained by the quantum chemical PM3 method.