Several partially hydrogenated phenanthridines were prepared by the methods of Bischler-Napieralsky's dihydroisoquinoline synthesis and of Pictet-Spengler's tetrahydroisoquinoline synthesis, and comparison between them was made. 5-Methyl-11-methoxy-1, 2, 3, 4, 4a, 6, 7, 8, 9, 13b-decahydro-9aH-dibenzo [ac] quinolizinium iodide was also prepared.