B. Dhawan et al., ASSIGNMENT OF THE PHOSPHORUS, PROTON AND CARBON-NMR SPECTRA OF 5,5-DIMETHYL-4H-1,4,2-OXAZAPHOSPHORIN-4-YL)METHYL] PHOSPHONIC ACID P-OXIDE, Journal of heterocyclic chemistry, 30(6), 1993, pp. 1683-1684
The H-1 and C-13 nmr signals of the methylene groups directly linked t
o the phosphorus atoms, namely P(2)-C(3)H2 and P(8)-C(7)H2 in la were
assigned with the help of hetronuclear decoupling experiments and HETC
OR spectrum.