反应详情

To a suspension of 4-pyrrolidin-1-yl-butyric acid (118.0 mg, 0.8 mmol, 1.5 eq) in 1,2-dichloroethane (3 mL), N,N′-carbonyldiimidazole (113.0 mg, 0.7 mmol, 1.4 eq) was added and the mixture was stirred at room temperature for 1 hour, then N,N-diisopropyl ethyl amine (87 μL, 0.5 mmol, 1.0 eq) was added and the mixture was stirred at room temperature for further 1 hour until complete dissolution of the suspension. 4-Methyl-5-o-tolyl-2H-pyrazol-3-ylamine (93.5 mg, 0.5 mmol, 1.0 eq) was added and the reaction was stirred for 18 hours, then at 50° C. for 1 day, until the conversion of the less stable ring nitrogen-acylated isomer to the title compound was observed (as monitored by LC-MS). The solvent was removed under reduced pressure, the crude was purified by SiO2 column to give 44.0 mg of the title compound (yield: 27%).

1. additionwas added
2. stirringthe mixture was stirred at room temperature for further 1 hour until complete dissolution of the suspension
3. stirringthe reaction was stirred for 18 hours
4. waitat 50° C. for 1 day