反应详情

A solution of 5-Bromoisatoic anhydride (2.00 g, 8.26 mmol) in THF (53.62 mL, 661.1 mmol) was treated with diethylamine (1.28 mL, 12.40 mmol) and allowed to stir overnight at rt. The mixture was concentrated in vacuo and purified using a Teledyne ISCO Combiflash® Rf system [0→4% MeOH in DCM] to afford 326 mg of the title compound (15%). 1H NMR (400 MHz, CD3OD) δ 7.24 (dd, J=2.27, 8.84 Hz, 1H), 7.13 (d, J=2.27 Hz, 1H), 6.71 (d, J=8.59 Hz, 1H), 3.43 (br. s., 4H), 1.18 (br. s., 6H). MS (ESI): m/z 271.41 [M+H]+. UPLC: tR=1.09 min (UPLC-SQD: analytical—2 min).

1. concentrationThe mixture was concentrated in vacuo
2. custompurified