4-Fluoroaniline → N-(4-Fluorophenyl)-5-methyl-2-furanacetamide

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Reaction Steps

5-Methyl-2-furanacetic acid (1.00 g, 7.14 mmol, synthesized as described WO 9507893, Example 19) was dissolved in CH3CN/DMF (4:1, 25 mL), 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide (1,37 g, 7.14 mmol) and 1-hydroxy-7-azabenzotriazole (0.972 g, 7.14 mmol) were then added followed by 4-fluoroaniline (0.676 mL, 7.14 mmol). After 3 h, the reaction was diluted with EtOAc (150 mL) and washed with 1 N HCl (1×30 mL), sat. aq. NaHCO3 (1×30 mL), brine (1×40 mL) and dried over sodium sulfate. Compound 216A (1.58 g, 95%)) was isolated as a yellow foam after concentration in vacuo. No further purification was necessary. HPLC: 78% at 2.647 min (retention time) (YMC S5 ODS column 4.6×50 mm eluting with 10–90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm).

Provenance & Evidence