反应详情

温度

110 °C

A mixture of 3-chloro-5-(1H-indol-5-yl)-1,2,4-thiadiazole (0.67 g, 2.85 mmol) and 4-methoxybenzylamine (1.95 g, 14.25 mmol, Aldrich) in DMSO (7 mL) was stirred for 12 h at 110° C. The reaction was cooled to RT and quenched with ice cold water (50 mL) and extracted into EtOAc (20 mL). The aqueous layer was back extracted with EtOAc (20 mL). The combined organic layers were dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by using silica-gel column chromatography (eluent: 30-40% EtOAc and petroleum ether) to give 5-(1H-indol-5-yl)-N-(4-methoxybenzyl)-1,2,4-thiadiazol-3-amine (670 mg, 70.5%) as a off brown solid. MS (ESI, pos. ion) m/z: 337.1 (M+1); 1H-NMR (300 MHz, CDCl3): δ 8.44 (brs, 1H), 8.21 (d, J=9 Hz, 1H), 7.73 (dd, J=8.4, 1.8 Hz, 1H), 7.45 (d, J=8.4 Hz, 1H), 7.35 (d, J=8.7 Hz, 2H), 7.28-7.26 (m, 1H), 6.90 (dd, J=6.9, 2.1 Hz, 2H), 6.64 (m, 1H), 5.42 (m, 1H), 4.62 (d, J=7.6 Hz, 1H), 3.80 (s, 3H).

1. temperatureThe reaction was cooled to RT
2. customquenched with ice cold water (50 mL)
3. extractionextracted into EtOAc (20 mL)
4. extractionThe aqueous layer was back extracted with EtOAc (20 mL)
5. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
6. concentrationconcentrated in vacuo
7. customThe residue was purified