Synthesis, Characterization, and Biological Activities of New Benzofuran Derivatives

Abstract

- A number of new benzofuran derivatives, ethyl 3-[(alkylamino)methyl]-6-methoxy-1-benzofuran-2-carboxylates (5a-i), were obtained via the reaction between ethyl 3-(bromomethyl)-6-methoxy-l-benzofuran-2-carboxylate (3) and amines or amino acid ethyl esters. In addition, 1,4-bis[(ethyl 6-methoxy-1-benzofuran-3-yl-2-carboxylate)methyl]piperazine (9), N,N'-diethyl-N,N'-bis[(6-methoxy-1-benzofuran-3-yl-2-carboxylate)methyl]but-2-ene-1,4-diamine (10) and 1,2-bis[(ethyl 6-methoxy-1-benzofuran-3-yl-2-carboxylate)methyl]-11,2-dimethylhydrazine (11) were also obtained from the reaction of 3 with diamines. Their in vitro anti-HIV-1 (strain III B ) and HIV-2 (strain ROD) activities of the synthesized compounds in human T-lymphocyte were tested; ethyl 3-bromomethyl-6-methoxycoumarlate displayed an ability to inhibit HIV-1 and HIV-2 replication in cell culture at non-toxic concentrations.