To a solution of 1-((4-fluorophenyl)carbamoyl)cyclopropane-1-carboxylic acid (15, 2.02 g, 9.0 mmol) and 4-aminophenol (1.18 g, 10.8 mmol) in DMF (5 mL), EDC·HCl (2.07 g, 10.80 mmol) was added. The reaction solution was stirred at room temperature for 6 h and monitored by TLC. Ice water (125 mL) was added, and the precipitate was filtered off, washed, and dried in a vacuum to yield 16 as a white solid (2.28 g, 80.6%), which can be used for the next step without any purification.
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