3-Nitro-9-(N-phthalyl- and N-tosylaminoacyl)carbazoles (II-XI) have been synthesized by the action of 3-nitro-9H-carbazole (I) on N-phthalyl- or N-tosylamino acid in THF-Et3N medium using the DCC method. Treatment of the 3-nitro derivatives (II-XI) with Sn/HCl gave the corresponding 3-amino-9-(N-phthalyl- or N-tosylaminoacyl)carbazoles (XII-XIX). Hydrazinolysis of the N-phthalylcarbazoles derivatives (III-VII) in ethanol gave the corresponding 3-nitro-9-(aminoacyl) carbazoles (XX-XXIII). Compounds (II-XI and XXI, XXII) were found to be active against some microorganisms.