Triphosgene → HCID 53241942, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of N1-(6-{[4-methyl-3-(methyloxy)phenyl]oxy}-3-pyridinyl)-D-isovalinamide (Reference Intermediate R8 42 mg) in dry dichloromethane (6 mL), TEA (0.089 mL, 0.638 mmol) was added. The mixture was cooled down to 0° C. and a solution of triphosgene (17.03 mg, 0.057 mmol) in dry dichloromethane (1.500 mL) was added dropwise. The mixture was stirred at that temperature for 1 hour, then a solution of triphosgene (17.03 mg, 0.057 mmol) in dry dichloromethane (DCM) (1.500 mL) was added dropwise again. The reaction was stirred for 30 minutes, it was maintained in the ice-bath and quenched with water (10 mL). The mixture was allowed to reach the room temperature then it was extracted with dichloromethane (3×7 mL). The combined organic layers were dried over sodium sulphate, filtered and evaporated. The residue obtained was purified by flash chromatography on silica gel using a 10 g SNAP column and cyclohexane/ethyl acetate as eluents from 80/20 to 50/50 (Biotage system). This afforded the title compound as a white solid (24 mg).

Provenance & Evidence