反应详情

3-Nitro-5-methoxycarbonylphenylboronic acid (225 mg, 1.0 mmol) was added to a vigorously stirred solution of sodium hydroxide (59 mg, 1.5 mmol) in water (15 mL), followed by sodium bicarbonate (681 mg, 8.1 mmol) and acetone (1 mL). Oxone® (543 mg, 0.88 mmol) was added slowly, keeping the temperature below 8° C. The reaction mixture was stirred 5 min and quenched with sodium bisulfite (600 mg). The reaction mixture was diluted with ethyl acetate and carefully acidified with concentrated hydrochloric acid. The reaction mixture was extracted with ethyl acetate (3×) and the combined organic layers were washed with water and brine and concentrated in vacuo to give 93A (258 mg, 100%) as a yellow solid. 1H NMR (400 MHz, CD3OD) δ ppm 3.95 (s, 3H) 7.74-7.78 (m, 1H) 7.78-7.83 (m, 1 H) 8.23-8.28 (m, 1H); LC/MS 198 (M+H).

1. customthe temperature below 8° C
2. customquenched with sodium bisulfite (600 mg)
3. additionThe reaction mixture was diluted with ethyl acetate
4. extractionThe reaction mixture was extracted with ethyl acetate (3×)
5. washthe combined organic layers were washed with water and brine
6. concentrationconcentrated in vacuo