反应详情

A mixture of 1-cyano-7-(4-fluoro-phenoxy)-4-hydroxy-isoquinoline-3-carboxylic acid butyl ester (80 mg, 0.21 mmol) (prepared according to U.S. Pat. No. 7,928,120) and 3-Amino-2,2-dimethyl-propionic acid tert-butyl ester (71 mg, 0.41 mmol) in MeOH (1.5 mL) was microwaved at 120° C. For 1 h. Reaction mixture was diluted with water (80 mL), acidified by 1 N HCl and then extracted with EtOAc. Organic layer was washed with brine, dried over MgSO4, filtered and concentrated. Residue was then treated with 3 mL of (½) TFA/CH2Cl2. Resultant mixture was stirred at room temperature for 5 h and concentrated to provide the title compound 90 mg (0.21 mmol) in 100% yield. LC-MS ESI−: 422.07 (M−1)−.

1. customprepared
2. customReaction mixture
3. extractionextracted with EtOAc
4. washOrganic layer was washed with brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated
8. additionResidue was then treated with 3 mL of (½) TFA/CH2Cl2
9. concentrationconcentrated