反应详情

360 mg (1.11 mmol) of 6-(2,4-dichlorophenyl)-4-oxo-4,5-dihydropyrazolo[1,5-a]pyrazine-2-carboxylic acid (Example 55A) were initially charged in dichloromethane (30 ml) and DMF (10 ml), and 320 mg (1.67 mmol) of EDC, 225 mg (1.67 mg) HOBt and 407 mg (3.33 mmol) of DMAP were added, followed by 0.5M ammonia in dioxane (2.44 ml, 1.22 mmol). The reaction mixture was stirred at RT for 20 h, the solvent was concentrated, the residue was poured into water (25 ml) and the precipitate was filtered off and washed with water and acetonitrile and dried. Drying gave 260 mg (72% of theory) of the product as a solid.

1. concentrationthe solvent was concentrated
2. additionthe residue was poured into water (25 ml)
3. filtrationthe precipitate was filtered off
4. washwashed with water and acetonitrile
5. customdried
6. customDrying