Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
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Synthesis, Antitumor, Antitrypanosomal and Antileishmanial Activities of Benzo[4,5]canthin-6-ones Bearing the N′-(Substituted benzylidene)-carbohydrazide and N-Alkylcarboxamide Groups at C-2
Camila Mareco Bento Leite SilvaFrancielle Pelegrin GarciaJean Henrique da Silva RodriguesCelso Vataru NakamuraTania Ueda-NakamuraEmerson MeyerAna Lucia Tasca Gois RuizMary Ann FoglioJoão Ernesto de CarvalhoWillian Ferreira da CostaMaria Helena Sarragiotto
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2012 Volume 60 Issue 11 Pages 1372-1379

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Abstract

A series of novel benzo[4,5]canthin-6-ones, bearing the N′-(substituted benzylidene)-carbohydrazide (11ae) and N-alkylcarboxamide (13ag) moieties at position-2, were synthesized and screened for their in vitro antitumor activity, against seven human cancer cell lines, and for antitrypanosomal and antileishmanial activities against Trypanosoma cruzi and Leishmania amazonensis. The results indicated that N-methylpiperazyl-6-oxobenzo[4,5]canthine-2-carboxamide (13f) displayed potent antitumor activity with IC50 values in the range of 1.15–8.46 µM for all cell lines tested. Compounds 13f and 13g bearing an N-methylpiperazylcarboxamide and N-morpholylcarboxamide at C-2, respectively, showed potent activities towards both Trypanosoma cruzi and Leishmania amazonensis parasites, with IC50 in the range of 0.4 to 16.70 µM.

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© 2012 The Pharmaceutical Society of Japan
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