(3-Aminopropyl)methylphosphinic acid → 3-{[(1R)-Isobutanoyloxyisobutoxy]carbonylamino}propyl Methylphosphinic Acid

Participants

Reaction Conditions

Reaction Steps

To a 3 L three necked round bottom flask fitted with a mechanical stirrer, temperature probe, and nitrogen inlet is added (25) (100 mmol), 3-aminopropylmethylphosphinic acid (100 mmol), THF (1 L), and water (100 mL). The suspension is stirred under a nitrogen atmosphere at 18-20° C. for 4 h during which time the reaction mixture becomes homogeneous. The THF is removed in vacuo and the reaction mixture is diluted with methyl tert-butyl ether (250 mL) and washed with 1N HCl (1×500 mL) and water (2×200 mL). The organic phase is separated and concentrated in vacuo to leave a white solid. The solid is purified by flash chromatography to afford the title compound (119) as a white solid.

Provenance & Evidence