Trimethyl phosphite → Dimethyl[4-(phenylsulfonyl)benzyl]phosphonate

Participants

Reaction Steps

1-(Bromomethyl)-4-(phenylsulfonyl)benzene (Step 1, 10.1 g, 32.5 mmol) was heated to reflux in trimethylphosphite (40 mL) for 16 hours. The cooled reaction was azeotroped with xylene then purified by flash column chromatography on silica, eluting with ethyl acetate to give dimethyl[4-(phenylsulfonyl)benzyl]phosphonate (9.5 g, 86%). δH (360 z, CDCl3): 7.92-7.84 (4H, m), 7.55-7.39 (5H, m), 3.64 (6H, d, J=10.9 Hz), 3.16 (2H, d, J=21.6 Hz).

Provenance & Evidence