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Reaction of 2-cinnamoyl-1-hydroxycarbazoles 2a - d, with phenacyl bromide, mercuric acetate and H₂O₂/NaOH under different reaction conditions yielded 2-benzoyl-3-styryl-furo[2,3-a]carbazoles 3a-d, 2-benzylidene-furo[2,3-a]carbazol-3(10H)-ones 4a - d and 3-hydroxy-2-phenylpyrano- [2,3-a]carbazol-4(11H)-ones 5a - d, respectively.