Phosphorus oxychloride → HCID 57811364, compound

Participants

Reaction Conditions

Reaction Steps

Phosphorus oxychloride (2.4 mmol) is added dropwise over 5 mins to a solution of 2-(5-bromo-4-(1-cyclopropylnaphthalen-4-yl)-4H-1,2,4-triazol-3-ylthio)acetic acid (810 mg, 2.0 mmol) in pyridine (20 mL) at 0° C. The mixture is stirred at 0° C. for a further 1 hour and then a solution of 1,2:5,6-Di-O-isopropilydene-□-D-glucofuranose (320 mg, 2.0 mmol) in pyridine (5 mL) is added dropwise over 5 mins. The mixture is stirred at 0° C. for a further 1 hour and 1 hour at 20° C. and then is quenched by addition of water (1 mL). Volatile solvents are removed in vacuo and DCM (200 mL) added. The organic phase is washed with water (1×50 mL), saturated sodium carbonate solution (1×50 mL) and brine (1×50 mL), dried over Na2SO4 and concentrated to dryness. Ethanol and water are added to produce a solid which is collected by filtration. Additional product is recovered by extraction of the filtrate with DCM. Combined product is concentrated, dried and purified by column chromatography (acetone/DCM eluent). The combined solids are dissolved in acetic acid (25 mL) and water (5 mL) mixture, heated at 60° C. for 3 hours. Volatile solvents are removed in vacuo. Ethanol and water are added to produce a solid which is collected by filtration.

Provenance & Evidence