HCID 18403070, compound → HCID 9903422, compound

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Reaction Steps

Butyl[2,4-di(benzyloxycarbonyl)butyl]phosphinic acid (2.9 g, 6.5 mmol) in 30 mL of water containing 0.32 g 10% Pd/C was hydrogenated on a Parr hydrogenator at 40 psi for 4.5 hours. The mixture was filtered through a pad of Celite and evaporated under high vacuum to give 2-[(butylhydroxyphosphinyl)methyl]pentanedioic acid (4, R=n-butyl) (0.75 g, 43%) as a clear and colorless viscous oil. 1H NMR (D2O): 2.4 ppm (m, 1H), 2.1 ppm (t, 2H), 1.9 ppm (m, 1H), 1.6 ppm (m, 3H), 1.4 ppm (m, 2H), 1.1 ppm (m, 4H), 0.6 ppm (t, 3H) Elemental Analysis Calculated C10H19O6P. 0.5 H2O: C 43.64, H 7.32: Found C 43.25, H 7.12

Provenance & Evidence