反应详情

A mixture of 5-formyl-N-methoxy-N-methyl-1H-indazole-3-carboxamide (400 mg, 1.72 mmol) from Synthetic Preparation 6, and 3-aminocrotononitrile (299 mg, 2.12 mmol) in HOAc (5 mL) was kept at 110° C. for 2 hr. After cooling to rt, the reaction mixture was diluted with EtOAc, washed with brine, dried, and concentrated. The crude product was purified by flash chromatography to afford 5-(3,5-dicyano-1,4-dihydro-2,6-dimethyl-4-pyridinyl)-N-methoxy-N-methyl-1H-indazole-3-carboxamide (500 mg, 80.5%) (Cpd. No. 143, Table 2). 1H-NMR (400 MHz, DMSO-D6): δ=9.65 (s, 1H), 7.85 (s, 1H), 7.65 (d, 1H), 7.38 (d, 1H), 4.58 (s, 1H), 3.78 (s, 3H), 3.44 (s, 3H), 2.03 (s, 6H) ppm.

1. washwashed with brine
2. customdried
3. concentrationconcentrated
4. customThe crude product was purified by flash chromatography