反应详情

温度

0 °C

To DMF (10 mL) at rt was added 3-(5-amino-4-benzoyl-pyrazol-1-yl)-4-methyl-benzoic acid 1 (0.50 g, 1.56 mmol, 1.0 eq), t-butylcarbazate (0.206 g, 1.56 mmol, 1.0 eq), EDCI (0.313 g, 1.63 mmol, 1.05 eq) and HOBt (0.238 g, 1.56 mmol, 1.0 eq). The reaction was stirred for 19 h, poured into brine (100 mL) and extracted with EtOAc (2×20 mL). The organic extracts were combined were washed with brine (1×20 mL). The brine layer was separated and extacted with EtOAc (1×10 mL). All organic extracts were combined dried over Na2SO4, filtered and concentrated in vacuo. This material was dissolved in CH2Cl2 (10 mL) and cooled to 0° C. TFA (3 mL) was added and the reaction mixture allowed to warm to rt over 2 h. The solvent was removed in vacuo to give crude solid which was triturated with EtOAc/ether (1/1) giving 2 (180 mg, 26%)as a light tan in color solid.

1. extractionextracted with EtOAc (2×20 mL)
2. washThe organic extracts were combined were washed with brine (1×20 mL)
3. customThe brine layer was separated
4. dry with materialAll organic extracts were combined dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. dissolutionThis material was dissolved in CH2Cl2 (10 mL)
8. additionTFA (3 mL) was added
9. temperatureto warm to rt over 2 h
10. customThe solvent was removed in vacuo
11. customto give crude solid which
12. customwas triturated with EtOAc/ether (1/1)