In the previous paper0, formation of both 9-alkyltetrahydrocarbazoles (IIa, b, c) and 11- alkyltetrahydrocarbazolenines (Ilia, b, c) by the alkylation of tetrahydrocarbazole (I) in liquid ammonia with sodium amide and alkyl halides was reported. But, when isopropyl iodide was employed as alkylation reagent, 11-isopropyltetrahydrocarbazolenine (Hid) was a sole product isolated. These 11-alkyltetrahydrocarbazolenines could be also prepared by the ...