As is known [1], N-acetylindoxyi (1) is capable of forming 3-arylaminoindoles (II) on heating with substituted anilines in acetic acid. Recently [2] we have reported that N-acetyl-3-p- nitrophenylaminoindole (Ilc) can be used as an initial compound for the synthesis of new derivatives of 1, 2-and 1, 4-dihydro-~ 5-carboline.