Filho Silvio Barberato, Gargioni Cybele, Silva Pinto Pedro Luiz, Chiodelli Silvia Gabriel, Gurgel Vellosa Sylvia Amaral, da Silva Rita Maria, da Silveira Maria Amélia Barata
Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 580, CEP 05508-900 São Paulo, Brazil.
Int J Pharm. 2002 Feb 21;233(1-2):35-41. doi: 10.1016/s0378-5173(01)00917-6.
Oxamniquine derivatives were synthesized and evaluated as novel schistosomicide agents. Oxamniquine (1,2,3,4-tetrahydro-2-[[(1-methylethyl)amino]methyl]-7-nitro-6-quinolinemethanol) was submitted to the Mannich reaction, using formaldehyde, paraformaldehyde and acetaldehyde as reagents, and gave three unexpected products: two of them were cyclized on the alkylamine side chain and another etherified on the aminequinolinemethanol group. The three compounds were biologically evaluated using mice infected with Schistosoma mansoni and showed promising activities, but had higher toxicities. For studies on structure-activity relationships, results demonstrate that the side alkylamine group can be modified with preserved activity, but that this modification is associated with increased toxicity.
