Novel N,S-Substituted naphthoquinone analogues from aminonaphthoquinones

Abstract

In this study, novel N,S-substituted naphthaquinone analogues (2, 4, 6, and 8) were synthesized from the reactions of previously known aminonaphthaquinone derivatives (1, 3, 5, and 7) with allyl mercaptan. 2-(allylthio)-3-(4-phenylpiperazin-1-yl)naphthalene-1,4-dione (2), 2-(allylthio)-3-(4-(2-fluorophenyl)piperazin-1-yl)naphthalene-1,4-dione (4), 2-(allylthio) -3-(4-benzylpiperidin-1-yl)naphthalene-1,4-dione (6) and 2-(4-chlorophenylamino)-3-(allylthio)naphthalene-1,4-dione (8) were obtained from the reactions of 2-chloro-3-(4-phenylpiperazin-1-yl)naphthalene-1,4-dione (1), 2-chloro-3-(4-(2-fluorophenyl)piperazin-1-yl)naphthalene-1,4-dione (3), 2-(4-benzylpiperidin-1-yl)-3-chloronaphthalene-1,4-dione (5), and 2-(4-chlorophenylamino) -3-chloronaphthalene-1,4-dione (7) with allyl mercaptan according to the general synthesis procedure. Synthesized new naphthaquinone analogues (2, 4, 6, and 8) were purified by column chromatography. The chemical structures of these novel N,S-substituted naphthaquinone analogues were characterized by spectroscopic methods (FT-IR, NMR, and MS).