Rapid and Efficient Synthesis of -Alkylenediphosphoric Acids from Phosphorus Oxychloride

Figure 3

³¹P NMR spectra of 1,12-bis[(dihydroxyphosphinyl)oxy]dodecane obtained with method . (a) Crude mixture obtained during step . (b) Crude mixture obtained after hydrolysis step and before purification.

(a)

(b)