Study of 5-nitroindazoles' anti-Trypanosoma cruzi mode of action: Electrochemical behaviour and ESR spectroscopic studies
作者:Jorge Rodríguez、Alejandra Gerpe、Gabriela Aguirre、Ulrike Kemmerling、Oscar E. Piro、Vicente J. Arán、Juan Diego Maya、Claudio Olea-Azar、Mercedes González、Hugo Cerecetto
DOI:10.1016/j.ejmech.2008.07.018
日期:2009.4
New indazole derivatives have been developed to know about structural requirements for adequate anti-Trypanosoma cruzi activity. In relation to position 1 of indazole ring, we have observed that a butylaminopentyl substituent (14) affords good activity, but N-oxidation of omega-tertiary amino moiety yields completely inactive compounds (17,18); the substituent at position 3 of indazole ring affects drastically the in vitro activity, 3-OH derivative 13 being completely inactive. On the other hand, since compound 22, denitro-analogue of active compound 4, does not show activity, the 5-nitro substituent of indazole ring seems to be essential. Intramolecular cyclization of side chain at position 1 also affords inactive compounds (19, 20). The electrochemical studies showed that the trypanocidal 5-nitroindazole derivatives yielded nitro-anion radical via one-electron process at physiological pH. This electrochemical behaviour occurs in the parasite according to ESR experiment with the T cruzi microsomal fraction showing that 5-nitroindazole derivatives suffer bio-reduction without reactive oxygen species generation. (C) 2008 Elsevier Masson SAS. All rights reserved.
Aran, Vicente J.; Asensio, Juan L.; Ruiz, Jose R., Journal of the Chemical Society. Perkin transactions I, 1993, # 10, p. 1119 - 1128
作者:Aran, Vicente J.、Asensio, Juan L.、Ruiz, Jose R.、Stud, Manfred
DOI:——
日期:——
Aran, V. J.; Stud, M.; Foces-Foces, C., Journal of Heterocyclic Chemistry, 1985, vol. 22, p. 1743 - 1745
作者:Aran, V. J.、Stud, M.、Foces-Foces, C.、Cano, F. H.、Martinez-Ripoll, M.
DOI:——
日期:——
ARAN, V. J.;STUD, M.;FOCES-FOCES, C.;CANO, F. H.;MARTINEZ-RIPOLL, M., J. HETEROCYCL. CHEM., 1985, 22, N 6, 1743-1745
作者:ARAN, V. J.、STUD, M.、FOCES-FOCES, C.、CANO, F. H.、MARTINEZ-RIPOLL, M.
DOI:——
日期:——
RUIZ, JOSE R.;ARAN, VICENTE J.;STUD, MANFRED, TETRAHEDRON LETT., 29,(1988) N 6, 697-700