Synthesis of novel deoxynucleoside S-methylphosphonic acids using S-(diisopropylphosphonomethyl)isothiouronium tosylate, a new equivalent of mercaptomethylphosphonate
作者:Ivana Kóšiová、Miloš Buděšínský、Natalya Panova、Ivan Rosenberg
DOI:10.1039/c0ob00738b
日期:——
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.
本文介绍了从 5′-脱氧-5′-卤代核苷、5′-O-对甲苯磺酸核苷和 2′-O-三氟甲基核苷出发,合成新型核苷酸类似物 5′-脱氧核苷-5′-S-甲基膦酸盐。这些化合物的硫代磷酸化是使用 S-(二异丙基膦酰甲基)异硫脲对甲苯磺酸盐(一种新型、无味、高效的巯基甲基膦酸盐等效物)实现的。巯甲基膦酸硫代阴离子是在原生态和非原生态溶剂中使用两个等量的异丙醇钠从异硫脲盐原位生成的。制备的核苷 5′-S-甲基膦酸盐经脱保护后,游离的膦酸转化为二磷酸衍生物(NTP 类似物)。研究人员将单核苷酸和 NTP 类似物作为参与核苷/核苷酸代谢的几种酶的底物/抑制剂。