反应详情

A solution of 7-(2-chlorophenylamino)-5,6-difluoro-3-methyl-2,3-dihydro-isoindol-1-one (18 mg, 0.059 mmol), NIS (17 mg, 0.074 mmol), and p-TsOH-H2O (24 mg, 0.12 mmol) in THF-MeOH (1 mL/1 mL) was stirred for 1 hour at room temperature. The reaction mixture was diluted with EtOAc, washed with saturated aqueous NaHCO3 and water. The organic layer was dried over MgSO4, filtered, and concentrated in vacuo to give the crude material that was purified by silica gel flash column chromatography (100% CH2Cl2 to 1% MeOH in CH2Cl2) to afford 7-(2-chloro-4-iodophenylamino)-5,6-difluoro-3-methyl-2,3-dihydro-isoindol-1-one (5.4 mg, 21%). MS APCI (−) m/z 433, 435 (M-, Cl pattern) detected; 1H NMR (400 MHz, CDCl3) δ 8.54 (s, 1H), 7.70 (d, 1H), 7.48 (dd, 1H), 6.75 (m, 2H), 6.04 (s, 1H), 4.63 (q, 1H), 1.49 (d, 3H).

1. washwashed with saturated aqueous NaHCO3 and water
2. dry with materialThe organic layer was dried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customto give the crude material that
6. customwas purified by silica gel flash column chromatography (100% CH2Cl2 to 1% MeOH in CH2Cl2)