Abstract
Nucleoside analogues are well known antitumor, antiviral, and chemotherapeutic agents. Alterations on both their sugar and the heterocyclic parts may lead to significant changes in the spectrum of their biological action and the degree of selective toxicity, as well as in their physicochemical properties. C5-arylalkynyl-β-D-ribofuranonucleosides 3-6, 3΄-deoxy 12-15, 3΄-deoxy-3΄-C-methyl-β-D-ribofurananucleosides 18-21 and 2΄-deoxy-β-D-ribofuranonucleosides 23-26 of uracil, were synthesized using a one-step Sonogashira reaction under microwave irradiation and subsequent deprotection. All newly synthesized nucleosides were tested for their antitumor or antiviral activity. Moderate cytostatic activity against cervix carcinoma (HeLa), murine leukemia (L1210) and human lymphocyte (CEM) tumor cell lines was displayed by the protected 3΄-deoxy derivatives 12b, 12c, 12d, and the 3΄-deoxy-3΄-methyl 18a, 18b, 18c. Antiviral evaluation revealed appreciable activity against Coxsackie virus B4, Respiratory syncytial virus, Yellow Fever Virus and Human Coronavirus (229E) for the 3΄-deoxy compounds 12b, 14, and the 3΄-deoxy-3΄-methyl 18a, 18c, 18d, accompanied by low cytotoxicity. This report describes the total and facile synthesis of modifi...Continue Reading
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