反应详情

4-(Acetylamino)-2-methylbenzoic acid (2 g, 10.4 mmol) was suspended in THF (50 mL) and borane-THF complex (1M in THF, 26 mL, 26 mmol) added drop-wise over ˜15 minutes. The reaction mixture was stirred under argon at room temperature overnight then quenched with water (52 mL) and extracted with ethyl acetate (×3). The combined organics were dried and concentrated to give the crude product which was purified by column chromatography. Elution with 0-100% ethyl acetate/petroleum ether yielded the title compound as a cream solid (0.379 g). δH (MeOD, 400 MHz) 7.36 (2H, m), 7.25 (1H, d), 4.57 (2H, s), 2.31 (3H, s), 2.10 (3H, s). MS (ES): MH+ 180.2.

1. customthen quenched with water (52 mL)
2. extractionextracted with ethyl acetate (×3)
3. customThe combined organics were dried
4. concentrationconcentrated
5. customto give the crude product which
6. customwas purified by column chromatography
7. washElution with 0-100% ethyl acetate/petroleum ether