Synthesis of novel deoxynucleoside S-methylphosphonic acids using S-(diisopropylphosphonomethyl)isothiouronium tosylate, a new equivalent of mercaptomethylphosphonate
Synthesis of novel deoxynucleoside S-methylphosphonic acids using S-(diisopropylphosphonomethyl)isothiouronium tosylate, a new equivalent of mercaptomethylphosphonate
major player in the interferon-induced antiviral defense mechanism of cells. Upon sensing viral dsRNA, 5′-phosphorylated 2′,5′-oligoadenylates are synthesized, and subsequently activate latent RNase L. To determine the influence of 5′-phosphate end on the activation of human RNase L, four sets of 5′-phosphonate modified oligoadenylates were prepared on solid-phase. The ability of these 5′-modified oligoadenylates
寡腺苷酸合成酶-核糖核酸酶 L 途径是干扰素诱导的细胞抗病毒防御机制的主要参与者。在感知病毒 dsRNA 后,合成 5'-磷酸化的 2',5'-寡腺苷酸,随后激活潜伏的 RNase L。为了确定 5'-磷酸末端对人 RNase L 激活的影响,四组 5'-在固相上制备膦酸酯修饰的寡腺苷酸。探索了这些带有缩短的、等排的和延长的膦酸酯键的 5'-修饰的寡腺苷酸激活 RNase L 的能力。我们发现等排键和延长一个原子的键通常被具有 EC 50的酶很好地耐受值与天然活化剂相当。相反,缩短一个原子或延长两个原子的键的活性降低。
Structure-Based Optimization of Bisphosphonate Nucleoside Inhibitors of Human 5′(3′)-deoxyribonucleotidases
By using a structure‐based approach, bisphosphonate nucleoside derivatives have been designed that act as potent inhibitors of human cytosolic and mitochondrial 5′‐nucleotidases.
通过使用基于结构的方法,设计了双膦酸酯核苷衍生物,作为人胞质和线粒体5'-核苷酸酶的有效抑制剂。
Synthesis of novel deoxynucleoside S-methylphosphonic acids using S-(diisopropylphosphonomethyl)isothiouronium tosylate, a new equivalent of mercaptomethylphosphonate
The synthesis of the novel nucleotide analogues 5′-deoxynucleoside-5′-S-methylphosphonates, starting from 5′-deoxy-5′-haloribonucleosides, 5′-O-tosylribonucleosides, and 2′-O-triflylnucleosides, is described. The phosphonothiolation of these compounds was achieved using S-(diisopropylphosphonomethyl)isothiouronium tosylate, a new, odourless, and efficient equivalent of mercaptomethylphosphonate. The thiolate anion of mercaptomethylphosphonate was generated in situ from the isothiouronium salt in both protic and aprotic solvents using two equivalents of sodium iso-propoxide. The prepared nucleoside 5′-S-methylphosphonates were deprotected, and the free phosphonic acids were transformed into diphosphoryl derivatives (the NTP analogues). Both mononucleotides and NTP analogues were studied as substrates/inhibitors of several enzymes that are involved in the nucleoside/nucleotide metabolism.