M. Lounasmaa, Mervi Hämailä
1978
Citations
0
Influential Citations
17
Citations
Journal
Tetrahedron
Abstract
Abstract The C(12b)-C(2)-C(3) stereochemical relationship in several racemic 1,2,3,4,6,7,12,12b-octahydro-3-methoxycarbonylindolo [2,3-a]quinolizine derivatives has been determined by 13C NMR spectral analysis. The proper shift assignment was confirmed by recording the spectra of selectively deuterated derivatives. The shifts of specific carbons are found to be conformationally diagnostic. The C(12b)-C(2)-C(3) stereochemical relationship in indolo[2,3-a]quinolizines obtained by selective alkaline decarboalkoxylative cyclization of partially hydrogenated 1-[2-(3-indolyl)ethyl]3,5-dimethoxycarbonylpyridine derivatives is discussed.