A new, considerablyimproved cycloSal maskinggroup has been developed. This new group combines four desirable properties and has been attached to the anti-HIV drug 2′,3′-dideoxy-2′,3′-didehydrothymidine (d4T, 1) to give 3,5-(di-tert-butyl)-6-fluoro-cycloSal-d4TMP (2i). This phosphate triester has a reasonable chemical half-life, highly selectively released d4TMP, has poor − if any − inhibitory effect
Disclosed herein, inter alia, are acyclic nucleotide analogs and methods of using an acyclic nucleotide analog for treating and/or ameliorating a papillomavirus infection. In one embodiment, the invention describes compounds with antiviral activity against a papillomavirus in the absence of a significant antiproliferative host cell effect. Therefore, the invention includes antiviral agents that selectively inhibit and/or block viral DNA synthesis and/or the production of virions of high risk HPV types.
Synthesis, structures and catalytic properties of iron(iii) complexes with asymmetric N-capped tripodal NO3 ligands and a pentadentate N2O3 ligand
作者:Lok H. Tong、Yee-Lok Wong、Sofia I. Pascu、Jonathan R. Dilworth
DOI:10.1039/b804414g
日期:——
[Fe(L(5))] (5). All complexes were structurally characterised by X-ray crystallography. In complexes 1-4, the ligands form five- and six-membered chelate rings with the iron centres which have distorted trigonal bipyramidal geometry with an N(2)O(3) coordination environment. Complex 5 adopts a similar distorted trigonal bipyramidal geometry also with N(2)O(3) coordination around the iron centre. The catalytic
Substituted 2-(2,6-di-t-butyl-4-alkylphenoxy)-4H-1,3,2-benzodioxaphosphorins that are readily prepared, for example from hindered phenols and ortho-methylolphenols, are effective heat and anti-oxidant stabilizers for organic materials subject to degradation by heat and oxygen, and provide particularly efficient stabilizer systems when combined with hydroxyphenylalkyleneyl isocyanurates.
Synthesis and Evaluation of Prodrugs of α-Carboxy Nucleoside Phosphonates
作者:Alan Ford、Nicholas D. Mullins、Jan Balzarini、Anita R. Maguire
DOI:10.1021/acs.joc.2c02135
日期:2022.11.4
A range of lipophilic prodrugs of α-carboxy nucleosidephosphonates, potent inhibitors of HIV-1 reverse transcriptase without requiring prior phosphorylation, were synthesized to evaluate their in vivo potency against HIV in cell culture. A series of prodrug derivatives bearing a free carboxylic acid where the phosphonate was masked with bispivaloyloxymethyl, diisopropyloxycarbonyloxymethyl, bisamidate
合成了一系列 α-羧基核苷膦酸盐的亲脂性前药,无需事先磷酸化即可有效抑制 HIV-1 逆转录酶,以评估它们在细胞培养中对 HIV 的体内效力。合成了一系列带有游离羧酸的前药衍生物,其中膦酸酯被双新戊酰氧基甲基、二异丙氧基羰基氧基甲基、双酰胺酸酯、芳氧基氨基磷酸酯、十六烷氧基丙基、CycloSal 和环氧基苄基部分掩蔽,采用现有的膦酸酯保护方法以适应相邻的羧酸部分。在 CEM细胞培养物中测定前药的抗 HIV 活性——双新戊酰氧甲基游离酸单膦酸盐前药表现出一定的活性(抑制浓度 - 50(IC 50) 59 ± 17 μM),而其他前药在 100 μM 时无活性。还制备了外消旋双新戊酰氧基甲基甲酯单膦酸酯前药,以评估甲酯作为羧酸前药的适用性。该化合物在细胞试验中没有表现出抗 HIV 活性。