Triphenylphosphine → (2E)-2-[3-cyclopropyl-4-(cyclopropylsulfonyl)phenyl]-N-(1-methyl-1H-pyrazol-3-yl)-3-(tetrahydro-2H-pyran-4-yl)acrylamide

Participants

Reaction Steps

To a solution of triphenylphosphine (131 mg) in dichloromethane (2 mL) was added N-bromosuccinimide (89 mg) under ice-cooling, followed by stirring for 15 minutes under ice-cooling. A solution of (2E)-2-[3-cyclopropyl-4-(cyclopropylsulfonyl)phenyl]-3-(tetrahydro-2H-pyran-4-yl)acrylic acid (100 mg) in dichloromethane (1 mL) was added thereto, followed by stirring at room temperature for 30 minutes. A solution of 1-methyl-1H-pyrazol-3-amine (39 mg) in dichloromethane (1 mL) and pyridine (0.086 mL) were added thereto at room temperature, followed by stirring at room temperature for 15 hours. To the reaction mixture was added water, followed by extraction with ethyl acetate. The organic layer was sequentially washed with 1 M hydrochloric acid, a saturated aqueous sodium hydrogen carbonate solution, and saturated brine, and dried over anhydrous magnesium sulfate. The crude product obtained by concentration was purified by silica gel column chromatography to obtain (2E)-2-[3-cyclopropyl-4-(cyclopropylsulfonyl)phenyl]-N-(1-methyl-1H-pyrazol-3-yl)-3-(tetrahydro-2H-pyran-4-yl)acrylamide (97 mg).

Provenance & Evidence