反应详情

温度

80 °C

To a suspension of compound (viii) (500 mg, 1.20 mmol) in a mixture of ethanol (30 mL) and water (6 mL) was added ammonium chloride (450 mg, 8.43 mmol) followed by iron powder (470 mg, 8.43 mmol). The mixture was heated to 80° C. and stirred vigorously for 90 min. After cooling to RT, 5% MeOH in DCM solution (50 mL) was added to the reaction mixture. The resulting suspension was filtered through celite and washed with MeOH. The filtrate was concentrated in vacuo to give a yellow solid which was then suspended in water (40 mL) and filtered. The solid was collected and dried to give 6-amino-2-(4-bromophenyl)-5-cyclopropyl-N-methyl-2H-indazole-3-carboxamide (ix) (320 mg, 68%) as a yellow solid. ESI-MS m/z calculated for [M+H]+: 385.07/387.06; found: 385.12/387.10.

1. temperatureAfter cooling to RT
2. filtrationThe resulting suspension was filtered through celite
3. washwashed with MeOH
4. concentrationThe filtrate was concentrated in vacuo
5. customto give a yellow solid which
6. filtrationfiltered
7. customThe solid was collected
8. customdried