Synthesis of Novel 1,2,3-Triazole Derivatives of Isocoumarins and 3,4-Dihydroisocoumarin with Potential Antiplasmodial Activity In Vitro.

Synthesis of Novel 1,2,3-Triazole Derivatives of Isocoumarins and 3,4-Dihydroisocoumarin with Potential Antiplasmodial Activity In Vitro.
Med Chem. 2020 Jun 02;:
Authors: da Silva Santos L, de Carvalho MFL, de Souza Pinto AC, da Fonseca AL, Dias Lopes JC, de Pilla Varotti F, de Freitas RP, Alves RB
Abstract
BACKGROUND: Malaria greatly affects the world health, having caused more than 228 million cases only in 2018. The emergence of drug resistance is one of the main problems in its treatment, demonstrating the urge for the development of new antimalarial drugs.
OBJECTIVE: Synthesis and in vitro antiplasmodial evaluation of triazole compounds derived from isocoumarins and a 3,4- dihydroisocoumarin.
METHOD: The compounds were synthesized in 4 to 6-step reactions with the formation of the triazole ring via the Copper(I)-catalyzed 1,3-dipolar cycloaddition between isocoumarin or 3,4-dihydroisocoumarin azides and terminal alkynes. This key reaction provided compounds with an unprecedented connection of isocoumarin or 3,4-dihydroisocoumarin and the 1,2,3-triazole ring. The products were tested for their antiplasmodial activity against a Plasmodium falciparum chloroquine resistant and sensitive strains (W2 and 3D7, respectively).
RESULTS: Thirty-one substances were efficiently obtained by the proposed routes with an overall yield of 25-53%. The active substances in the antiplasmodial test displayed IC50 values rangin...

Source: Medicinal Chemistry - June 1, 2020 Category: Chemistry Authors: da Silva Santos L, de Carvalho MFL, de Souza Pinto AC, da Fonseca AL, Dias Lopes JC, de Pilla Varotti F, de Freitas RP, Alves RB Tags: Med Chem Source Type: research