Methyl dimethylphosphonate

Trimethyl phosphite P(OMe)3 spontaneously iso-merizes to methyl dimethylphosphonate MePO-(OMe)2, whereas other trialkyl phosphites undergo the Michaelis-Arbusov reaction with alkyl halides via a phosphonium intermediate ... 

Since has an odd mass number, nuclei absorb in the NMR and, in many ways, these nuclei behave similarly to protons in NMR spectroscopy. With this in mind, explain why the NMR spectrum of methyl dimethylphosphonate, CH3PO(OCHa)2, consists of two doublets at 1.5 and 3.7 ppm. 

The dibromotetritol ether 1 has been converted into the epimeric mixture of phosphinates 2 and 3 (Scheme 1), while phosphinate 4, on base treatment (NH4OH), released the hypophosphorous acid 5. Phosphonate 6 has been prepared as a potential inhibitor of fructose-6-phosphate 1-phosphotransferase. Addition of lithiated methyl dimethylphosphonate to 2,3 5,6-di-0-isopropyli-dene-L-gulonolactone and then oxidation of the product 7 with the Dess-Martin reagent has afforded the diketophosphonate 8 (Scheme... 

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