Phosphorus oxide (P4O10) → HCID 25230337, compound

Participants

Reaction Steps

To a stirring solution of phosphorus pentoxide (0.38 g, 130 mmol) in DCM (8 mL) at 0° C. was added a solution of 5-{4-[2-(3-chlorophenyl)-2-hydroxyethoxy]benzyl}-1,3-thiazolidine-2,4-dione (0.25 g, 0.66 mmol) in DCM (8 mL) followed by dimethyl sulfoxide (0.23 mL, 3.30 mL). After stirring for 15 minutes N,N-diisopropylethylamine (0.34 mL, 2.00 mmol) was added. After 45 minutes the reaction was poured into cold saturated NaHCO3 and the mixture was extracted with EtOAc (×2). The combined extracts were washed with brine, dried (Na2SO4), filtered and evaporated in vacuo. The residue was chromatographed on a small silica gel column eluting with 0-15% EtOAc/DCM. Fractions containing product were combined and evaporated in vacuo to give 117 mg (47%) of a white solid. MS (ESI−) for C18H14ClNO4S m/z 374.1 (M−H)−.

Provenance & Evidence