Studies in the chemistry of erythrina alkaloide derivatives—II : Synthesis and stereochemistry of decahydro-3-methyl-6H-pyrido]2,1-i]indole

1,2,3,4,7,7a,8,9,10,11-Decahydro-3-methyl-6$\text{H}$-pyrido[2,1-i]indole was prepared as an example of an erythrinane derivative lacking the aromatic moiety. The stereochemical structure of this compound and its 6-oxo derivative were found to be predominantly cis A/B, trans B/C, axial CH₃ and cis A/B, axial CH₃, respectively.