反应详情

4′-Trifluoromethyl-biphenyl-2-carboxylic acid (5.04 g, 18.95 mmol) and 1-ethyl-5-nitro-1H-indole-2-carboxylic acid ethyl ester (4.00 g, 17.23 mmol) were dissolved in DCM (100 mL). DIEA (8 g, 61.8 mmol) was added to the above mixture and the mixture was stirred at room temperature for 5 minutes. PyBroP (9.63 g, 20.67 mmol) was added to the above solution in one portion. The reaction mixture was stirred for another 3 hours. The precipitate was filtered off and washed with cold DCM to provide the title compound (4.5 g, 54.4%).

1. stirringThe reaction mixture was stirred for another 3 hours
2. filtrationThe precipitate was filtered off
3. washwashed with cold DCM