反应详情

To a solution of 5-nitro-1H-indazol-3-ylamine in pyridine (Ryan Scientific, 0.150 g, 0.838 mmol) cooled to about 0° C. in an ice bath, was added 3-dimethylamino-benzoyl chloride (0.154 g, 0.838 mmol). The reaction mixture was stirred as it warmed to ambient temperature. After about 1 hour it was poured into crushed ice, then extracted with EtOAc (10 mL). The organic solvent portion was washed with a 1M aqueous HCl solution, then concentrated and dried under reduced pressure. The residue was further purified via preparative RP-HPLC (Rainin C18, 8 mm, 300 Å, 35 cm; 5-100% acetonitrile/0.1 M ammonium acetate over 20 min, 100% acetonitrile hold 10 minutes, 21 mL/min) to obtain 3-dimethylamino-N-(5-nitro-1H-indazol-3-yl)-benzamide as a white solid (0.002 g, 0.006 mmol); RP-HPLC (Table 1, Method e) Rt 1.95 min; m/z: (M+H)+ 326.4.

1. additionAfter about 1 hour it was poured
2. custominto crushed ice
3. extractionextracted with EtOAc (10 mL)
4. washThe organic solvent portion was washed with a 1M aqueous HCl solution
5. concentrationconcentrated
6. customdried under reduced pressure
7. customThe residue was further purified via preparative RP-HPLC (Rainin C18, 8 mm, 300 Å, 35 cm; 5-100% acetonitrile/0.1 M ammonium acetate over 20 min, 100% acetonitrile hold 10 minutes, 21 mL/min)