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Triethylphosphite (9.28 mL, 53.3 mmol) and α-bromo-p-toluic acid (10.4 g, 48.4 mmol) were suspended in toluene (25 mL) and the mixture was heated to reflux for 18 h. The mixture was cooled to room temperature. After 12 h, the resulting white solid was collected by suction filtration, washed with petroleum ether and dried to yield 4-(diethoxyphosphorylmethyl)benzoic acid as a white solid (10.2 g, 77%): mp 117-120° C.; 1H NMR δ 1.26 (t, J=6.8 Hz, 6H), 3.24 (d, J=25.6 Hz, 2H), 4.06 (m, 4H), 7.38-7.40 (m, 2H), 8.02 (d, J=7.6 Hz, 2H), 11.4 (br s, 1H); 13C NMR δ 16.5, 16.6, 33.4, 34.8, 62.8, 62.9, 129.1, 129.2, 130.00, 130.05, 130.10, 130.48, 130.51, 137.3, 137.4, 170.1; FABMS obsd 273.0896, calcd 273.0892; Anal. Calcd. for C12H17O5P: C, 52.94; H, 6.29. Found: C, 52.92; H, 6.28. A suspension of 4-(diethoxyphosphorylmethyl)benzoic acid (9.99 g, 36.7 mmol) in anhydrous THF (40 mL) at 0° C. was treated dropwise over 10 min with borane-THF complex (40.3 mL, 40.3 mmol, 1.0 M in THF). The reaction mixture was stirred at room temperature for 4 h. The reaction was quenched by slow addition of water. The mixture was concentrated and the residue was partitioned between water (100 mL) and CH2Cl2 (100 mL). The aqueous layer was washed with CH2Cl2. The combined organic layers were washed with water, dried (MgSO4), and concentrated to give a yellow oil. Analysis by TLC and 1H NMR spectroscopy showed starting material (˜10%) and the desired benzyl alcohol. The latter (9.56 g) was dissolved in CH2Cl2 and rapidly added to a sample of PCC (10.8 g, 50.1 mmol) in CH2Cl2 (50 mL) with rapid stirring. After 2 h, ethyl ether (150 mL) was added and the organic solution was decanted from the tarry residue. The residue was washed with ethyl ether (3×50 mL). The combined organic solution was filtered through Florisil and concentrated to a brown oil. Kugelrohr distillation (190° C. @ 0.05 Torr) afforded a clear, colorless oil (6.54 g, 77%): 1H NMR δ 1.24 (t, J=7.2 Hz, 6H), 3.21 (d, J=22.4 Hz, 2H), 4.03 (m, 4H), 7.45-7.48 (m, 2H), 7.83 (d, J=7.6 Hz, 2H), 9.99 (s, 1H); 13C NMR δ 16.1, 16.2, 33.0, 34.9, 62.1, 62.2, 77.2, 129.49, 129.53, 129.6, 129.66, 129.71, 130.2, 130.2, 138.8, 138.9, 191.61, 191.63; 31P NMR δ 25.4, 25.9; FABMS obsd 257.0949, calcd 257.0943 (C12H17PO4).

1. customThe reaction was quenched by slow addition of water
2. concentrationThe mixture was concentrated
3. customthe residue was partitioned between water (100 mL) and CH2Cl2 (100 mL)
4. washThe aqueous layer was washed with CH2Cl2
5. washThe combined organic layers were washed with water
6. dry with materialdried (MgSO4)
7. concentrationconcentrated
8. customto give a yellow oil
9. waitAfter 2 h
10. customthe organic solution was decanted from the tarry residue
11. washThe residue was washed with ethyl ether (3×50 mL)
12. filtrationThe combined organic solution was filtered through Florisil
13. concentrationconcentrated to a brown oil
14. distillationKugelrohr distillation (190° C. @ 0.05 Torr)