反应详情

To a stirred solution of A-2 (600 mg, 2.34 mmol) in DMF (10 ml) was added EDCI (672 mg, 3.51 mmol) and HOBt (538 mg, 3.51 mmol) at 25° C. Stirring was continued for 10 min. 4-Amino-1-methyl-1H-pyrazole-3-carboxylic acid methyl ester (362 mg, 2.35 mmol) and triethylamine (0.8 ml, 5.35 mmol) were subsequently added to the above solution. The reaction mixture was stirred at 25° C. overnight, then quenched with water (8 ml), and extracted with CH2Cl2. The combined organic layers were washed with brine, dried (Na2SO4), filtered, and evaporated. The crude product thus obtained was purified by column chromatography over silica gel (2% MeOH/CH2Cl2) to provide the title compound (642 mg, 69%) as yellow sticky solid.

1. stirringThe reaction mixture was stirred at 25° C. overnight
2. customquenched with water (8 ml)
3. extractionextracted with CH2Cl2
4. washThe combined organic layers were washed with brine
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. customevaporated
8. customThe crude product thus obtained
9. customwas purified by column chromatography over silica gel (2% MeOH/CH2Cl2)