Phosphonated Carbocyclic 2‘-Oxa-3‘-azanucleosides as New Antiretroviral Agents
摘要:
Phosphonated carbocyclic 2'-oxa-3'-azanucleosides have been synthesized and tested for their antiretroviral activity. The obtained results have shown that some of the compounds were as powerful as azydothymidine in inhibiting the reverse transcriptase activity of the human retrovirus T-cell leukemia/lymphotropic virus type 1 and in protecting human peripheral blood mononuclear cells against human retrovirus T-cell leukemia/lymphotropic virus type 1 transmission in vitro. These data indicate that phosphonated carbocyclic 2'-oxa-3'-azanucleosides possess the necessary requirements to efficiently counteract infections caused by human retroviruses.
Phosphonated Carbocyclic 2‘-Oxa-3‘-azanucleosides as New Antiretroviral Agents
摘要:
Phosphonated carbocyclic 2'-oxa-3'-azanucleosides have been synthesized and tested for their antiretroviral activity. The obtained results have shown that some of the compounds were as powerful as azydothymidine in inhibiting the reverse transcriptase activity of the human retrovirus T-cell leukemia/lymphotropic virus type 1 and in protecting human peripheral blood mononuclear cells against human retrovirus T-cell leukemia/lymphotropic virus type 1 transmission in vitro. These data indicate that phosphonated carbocyclic 2'-oxa-3'-azanucleosides possess the necessary requirements to efficiently counteract infections caused by human retroviruses.
N-O diheterocyclic nucleosides: Synthesis of 2′-n-methyl-3′-hydroxymethyl-1′,2′-isoxazolidinylthymidine
作者:Yuejun Xiang、Jie Chen、Raymond F. Schinazi、Kang Zhao
DOI:10.1016/0040-4039(95)01499-8
日期:1995.10
Isoxazolidine thymidine derivatives were synthesized by the condensation of silylated thymine with isoxazolidinyl acetate prepared by the Michael addition of an α,β-unsaturated ester with N-methylhydroxyamine followed by DIBAL reduction and acetate production.
An efficient biocatalytic procedure to obtain chiral N,O-nucleoside derivatives consisting of a lipase-catalysed resolution of the corresponding racemates in organic solvent has been developed. Enantioselective esterification of thymine and cytosine derivatives, (+/-)-9a and (+/-)-9b, has been Investigated by comparing the efficiency of different lipases and acyl donors. Since esterification of (+/-)-9a and (+/-)-9b, Occurred with low enantioselectivity (E <= 14) in the presence of the lipases considered, for preparative purposes we resorted, with Success, to a double sequential kinetic resolution, using Lipozyme IM as the best catalyst. This approach enables LIS to obtain all the enantiomers with ee >= 95%. The absolute configuration of the new chiral N-acetyl cytosine derivative 9b was established by circular dichroism spectroscopy. (c) 2009 Elsevier Ltd. All rights reserved.
Phosphonated Carbocyclic 2‘-Oxa-3‘-azanucleosides as New Antiretroviral Agents
Phosphonated carbocyclic 2'-oxa-3'-azanucleosides have been synthesized and tested for their antiretroviral activity. The obtained results have shown that some of the compounds were as powerful as azydothymidine in inhibiting the reverse transcriptase activity of the human retrovirus T-cell leukemia/lymphotropic virus type 1 and in protecting human peripheral blood mononuclear cells against human retrovirus T-cell leukemia/lymphotropic virus type 1 transmission in vitro. These data indicate that phosphonated carbocyclic 2'-oxa-3'-azanucleosides possess the necessary requirements to efficiently counteract infections caused by human retroviruses.