反应详情

温度

100 °C

In a 20 mL glass microwave tube, 2-chloro-6-(tributylstannyl)pyrazine (0.807 g, 1.999 mmol), 5-(3-iodo-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-oxadiazol-2-amine (1.00 g, 1.665 mmol), CuI (0.381 g, 1.999 mmol), Pd(PPh3)4 (0.096 g, 0.083 mmol) was purged with argon and treated with DMF (15 mL). The tube was heated in an Initiator microwave reactor (Personal Chemistry, Biotage AB, Inc., Uppsala, Sweden) at 100° C. for 1 h. The crude mixture was then diluted with DCM and washed with water. The organic layer was dried, filtered and concentrated and the residue was purified with flash chromatography to give 5-(3-(6-chloropyrazin-2-yl)-1-tosyl-1H-indol-5-yl)-N-(4-methoxybenzyl)-1,3,4-oxadiazol-2-amine (0.48 g, 0.818 mmol, 49%) as a light yellow amorphous solid. MS (ESI, pos. ion) m/z: 586.9 (M+1). 1H NMR (400 MHz, DMSO-d6) δ ppm 9.44 (1H, s), 9.02 (1H, s), 8.85 (1H, s), 8.71 (1H, s), 8.28-8.36 (1H, m), 8.18 (1H, d, J=8.8 Hz), 8.03 (1H, m, J=8.4 Hz), 7.95 (1H, s), 7.88-7.95 (1H, m), 7.45 (1H, m, J=8.2 Hz), 7.33 (2H, m, J=8.6 Hz), 6.90 (2H, m, J=8.6 Hz), 4.37 (2H, d, J=6.1 Hz), 3.72 (3H, s), 2.33 (3H, s).

1. washwashed with water
2. customThe organic layer was dried
3. filtrationfiltered
4. concentrationconcentrated
5. customthe residue was purified with flash chromatography