The preparation of 2,3-dihydro-1H-pyrrolo[1,2-a]indole, 2,3-dihydro-9-methyl-1H-pyrrolo[1,2-a]indole, 1,2,2a,3,4,5-hexahydropyrrolo[3,2,1-jk]carbazole, and 2,3,3a,4,5,6-hexahydro-1H-pyrido[3,2,1-jk]carbazole