Stereoregulation in the preparation of 1- and 3- monosubstituted 1,2,3,4,6,7,12,12b-octahydroindolo[2,3-]quinolizines

Our recently developed method is successfully applied to the preparation of 1- and 3-monosubstituted 1,2,3,4,6,7,12,12b-octahydroindolo[2,3- a ]quinolizines possessing the C(12b)H-C(1)H and C(12b)H-C(3)H relationship, respectively, cis or trans at will. Complete 13C NMR data are presented for the prepared compounds.