Ethyl Acetate → 2,3-Difluoro-N-(2-fluoro-4-iodophenyl)-5-methoxy-6-nitroaniline

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Reaction Steps

A mixture of sodium methoxide (32.0 g, 600 mmol) in dry THF (500 mL) at −78° C. was added to (2-fluoro-4-iodo-phenyl)-(2,3,5-trifluoro-6-nitro-phenyl)-amine (25 g, 60 mmol) and the resulting mixture was stirred at room temperature overnight. The reaction was monitored by TLC (20% ethyl acetate in hexane). The reaction mixture was quenched with 200 mL of water and concentrated. The concentrate was acidified with cold 2N HCl (pH=2) and extracted with ethyl acetate (200 mL×3). The combined organic layers were washed with brine, dried over anhydrous Na2SO4 and concentrated to afford the crude product. Purification by column chromatography on silica gel (1-5% ethyl acetate in hexane) afforded 18 g of the product (70.6% yield). H1NMR (CDCl3, 300 MHz): δ 7.42 (dd, 1H), 7.34 (d, 1H), 6.9 (s, 1H), 6.64-6.54 (m, 2H), 3.92 (s, 3H). LCMS: 94.1%, m/z=422.9 (M−1). HPLC: 98.8%.

Provenance & Evidence