Synthesis of C-6 Pyrimidine Acyclic Nucleoside Analogs as Potential Antiviral Agents
作者:Ling-Yih Hsu、Dean S. Wise、William M. Shannon、John C. Drach、Leroy B. Townsend
DOI:10.1080/15257779408013263
日期:1994.3
A number of pyrimidine acyclic nucleosides in which the acyclic moiety is attached to the C-6 position rather than N-1 of the pyrimidine ring have been prepared. This was accomplished via treatment of lithiated 2,4-methoxy-5,6-dimethylpyrimidine, or, 2,4-dimethoxy-6-methylpyrimidine with 1,3-bis-(benzyloxy)-2-propanone, benzyl chloromethyl ether or oxirane, respectively, to give the corresponding key intermediates 6-[3-benzyloxy-2-[(benzyloxy)methyl]-2-hydroxypropyl]-2,4- dimethoxy-5-methylpyrimidine (2a), 6-[3-benzyloxy-2-[(benzyloxy)methyl]-2-hydroxypropyl]-2,4-dimethoxypyrimidine (2b), 6-(2-benzyloxyethyl)-2,4-dimethoxy-5-methylpyrimidine (3), and 2,4-dimethoxy-6-(3-hydroxypropyl)-5-methylpyrimidine (4a). After acidic hydrolysis, followed by debenzylation with boron trichloride these key intermediates were converted to the target C-6 pyrimidine acyclic derivatives. Compounds 6-8b, 11-13, 15, 16, 20, 22, 26, and 29-32 were evaluated for activity against herpes viruses and human immunodeficiency virus. None of the compounds were active against the viruses nor were they cytotoxic at the highest concentration tested.