HCID 57973280, compound → HCID 57973286, compound

Participants

Reaction Steps

To a 500 mL Parr flask was added 1-oxo-1-phenyl-1λ5-phosphinane-4,4-dicarboxylic acid dibenzyl ester (8.5 g, 18 mmol), ethanol (250 mL), and palladium on carbon (10%, 1.1 g). The flask was charged with hydrogen (51 psi), and agitated on a mechanical shaker. After 1 hour, the ballast was re-charged to 50 psi (from 40 psi) and shaking continued overnight (14 hours). The reaction mixture was filtered and the solvent removed in vacuo to provide 1-oxo-1-phenyl-1λ5-phosphinane-4,4-dicarboxylic acid (1.8 g, 35%) as a white solid. 1H NMR (400 MHz, d6-DMSO) δ 7.9-7.4 (m, 5H), 2.6-1.4 (m, 8H); ESMS m/z: found, 283 (M+1)+.

Provenance & Evidence