反应详情

温度

110 °C

To a microwave tube charged with 4-bromo-2-cyclopentyl-5-nitrophenyl methyl carbonate (500 mg, 1.45 mmol), Pd(dppf)Cl2 (96 mg, 0.13 mmol), potassium trifluoro-methyl-boron (177 mg, 1.45 mmol) and cesium carbonate (1420 mg, 4.36 mmol) was added tetrahydrofuran (2.5 mL) and water (1.25 mL). The reaction heated at 110° C. for 35 min under microwave irradiation. The reaction was partitioned between ethyl acetate and water. The organic layer was separated, dried over Na2SO4, filtered and concentrated in vacuo to yield a brown oil. Purification by silica gel chromatography (0-6% ethyl acetate/hexanes) provided 2-cyclopentyl-4-methyl-5-nitro-phenol (167 mg, 52% yield). 1H NMR (400.0 MHz, DMSO-d6) δ 10.08 (s, 1H), 7.43-7.38 (m, 1H), 7.22 (s, 1H), 3.28-3.21 (m, 1H), 2.43 (s, 3H), 1.96-1.91 (m, 2H), 1.80-1.51 (m, 6H).

1. customThe reaction was partitioned between ethyl acetate and water
2. customThe organic layer was separated
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customto yield a brown oil
7. customPurification by silica gel chromatography (0-6% ethyl acetate/hexanes)