Synthesis of novel uracil non-nucleoside derivatives as potential reverse transcriptase inhibitors of HIV-1

El Brollosy NR;Al Deeb OA;El Emam AA;Pedersen EB;La Colla P;Collu G;SANNA, GIUSEPPINA;LODDO, ROBERTA

2009-01-01

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Abstract

Novel emivirine and TNK-651 analogues 5a–d were synthesized by reaction of chloromethyl ethyl ether and / or benzyl chloromethyl ether, respectively, with uracils having 5-ethyl and 6-(4-methylbenzyl) or 6-(3,4-dimethoxybenzyl) substituents. A series of new uracil non-nucleosides substituted at N-1 with cyclopropylmethyloxymethyl 9a–d, 2-phenylethyloxymethyl 9e–h, and 3-phenylprop-1-yloxymethyl 9i–l were prepared on treatment of the corresponding uracils with the appropriate acetals 8a–c. Some of the tested compounds showed good activity against HIV-1 wild type. Among them, 1-cyclopropylmethyloxymethyl-5-ethyl-6-(3,5-dimethylbenzyl)uracil 9c and 5-ethyl-6-(3,5-dimethylbenzyl)-1-(2-phenylethyloxymethyl)uracil 9g showed inhibitory potency equally to emivirine against HIV-1 wild type. Furthermore, compounds 9c and 9g showed marginal better activity against NNRTI resistant mutants than emivirine.