School of Chemistry, Georgia Institute of Technology, Atlanta, Georgia 30332. Received June 29, 1984 (-)-and (+)-trachelanthic and (-)-and (+)-viridifloric acids were synthesized and their isopropylidene derivatives were regiospecifically coupled, at C-9, wit?(-)- retronecine (2) obtained by hydrqlysis of monocrotaline (I), isolated from Crotalaria spectabilis. Hydrolysis, fouswed by oxidation, led to the N-oxides of indicine (7), ...
