Synthesis of 2-pyridylthiophosphinic acids and 2-pyridylthiophosphonate monoesters via nucleophilic aromatic substitution
作者:Natsuhisa Oka、Kensuke Ori、Kaori Ando
DOI:10.1080/10426507.2016.1248763
日期:2017.4.3
were converted into N-methoxypyridinium sulfonates, which were then used for nucleophilic aromatic substitution with the H-thiophosphinate/thiophosphonate esters to afford 2-pyridylthiophosphinate monoesters and 2-pyridylthiophosphonate diesters. Finally, alkaline hydrolysis and subsequent neutralization afforded various 2-pyridylthiophosphinic acids and 2-pyridylthiophosphonate monoesters in good yields
图形摘要 在本研究中,我们开发了一种合成 2-吡啶硫代次膦酸和 2-吡啶硫代膦酸单酯的方法,该方法使用容易获得的原料 H-次膦酸酯和 H-膦酸酯以及吡啶 N-氧化物。H-次膦酸酯和H-膦酸酯被硫化,得到H-硫代次膦酸酯和H-硫代膦酸酯。吡啶N-氧化物转化为N-甲氧基吡啶鎓磺酸盐,然后将其用于与H-硫代次膦酸酯/硫代膦酸酯的亲核芳族取代,以提供2-吡啶硫代次膦酸单酯和2-吡啶硫代膦酸二酯。最后,碱水解和随后的中和以良好的产率提供了各种 2-吡啶基硫代次膦酸和 2-吡啶基硫代膦酸单酯。