Novel phosphitylating reagents containing a phosphorus–fluorine bond and their application in efficient synthesis of phosphorofluoridates and phosphorofluoridothionates
摘要:
包含 P–F 键的新型磷酸化试剂以优异的产率从商业原料中获得。它们在四唑、氯三甲基硅烷或苯甲酰氯的存在下,在中性溶剂中于 20 °C 下与醇反应,生成中间体氟磷酸酯。随后的氧化或硫化处理及保护基团的去除,可得到总产率超过 90% 的氟磷酸酯和硫氟磷酸酯。
New Phosphitylating Reagents Containing P-F Bond and Their Application in the Synthesis of P-Fluoro Nucleosidyl Phosphates, Thiophosphates and Selenophosphates
An efficient and general synthesis of phosphorofluoridates RO-P(X)(OH)F (X=O) and their analogues (X=S, Se) based on two new phosphitylating reagents: 2-cyanoethyl-N,N-diisopropylfluorophosphoioamidite F-P(NPr2i)OCH2CH2CN and tertbutyl-N,N-diisopropylfluorophosphoroamidite F-P(NPr2i)OBut is described.
Novel phosphitylating reagents containing a phosphorus–fluorine bond and their application in efficient synthesis of phosphorofluoridates and phosphorofluoridothionates
作者:Wojciech Dąbkowski、Izabela Tworowska
DOI:10.1039/b103082p
日期:——
Novel phosphitylating reagents containing a PâF bond are obtained in excellent yield from commercial materials. They react with alcohols at 20 °C in neutral solvents in the presence of tetrazole, chlorotrimethylsilane or benzoyl chloride to give the intermediate phosphorofluoridites. Subsequent oxidation or sulfurization followed by the removal of protecting groups gives the phosphorofluoridates and thiophosphorofluoridates in over 90% total yield.
包含 P–F 键的新型磷酸化试剂以优异的产率从商业原料中获得。它们在四唑、氯三甲基硅烷或苯甲酰氯的存在下,在中性溶剂中于 20 °C 下与醇反应,生成中间体氟磷酸酯。随后的氧化或硫化处理及保护基团的去除,可得到总产率超过 90% 的氟磷酸酯和硫氟磷酸酯。
Synthesis of 5’-fluorophosphate-modified short-interfering RNAs
作者:Andrew Varley、Jean-Paul Desaulniers
DOI:10.1080/15257770.2022.2148693
日期:2023.5.4
Abstract We have developed an improved scheme for the synthesis of a mono-fluorinated phosphoramidite for the 5’-modification of nucleic acids using standard phosphoramidite chemistry. We describe the first report of a phosphofluoridate modified siRNA strand and have evaluated C18 HPLC for purification of modified strands from unreacted siRNA strands. Lastly, the biological activity of the high purity