Benzo [a] quinolizidine and indolo [2, 3-a] quinolizidine ring systems are key subunits of naturally occurring isoquinoline and indole alkaloids. 1 1-Aminoindolo [2, 3-a]-quinolizidines have been used as intermediates in the synthesis of the pharmacologically interesting pentacyclic compound 62 and (E)-azaeburnane derivatives. 3 Benzo-[a] quinolizidines, including 1-aminobenzo [a] quinolizidines, have also served as intermediates in the ...
