反应详情

HATU (105.8 mg, 0.278 mmol) was added to a solution of 5-fluoro-2-(methylsulfonamido)benzoic acid (57.1 mg, 0.246 mmol) in 3 mL of anhydrous DMF at room temperature. After 15 min of stirring, intermediate 6 (44.8 mg, 0.182 mmol) was added followed immediately by triethylamine (0.040 mL, 0.288 mmol). Reaction mixture stirred at room temperature for 24 hours under argon. Mixture was then poured into a mixture of 40 mL of 1:1 water/brine and extracted three times with 40 mL of ethyl acetate. The combined organic layers were washed with 50 mL of 1:1 water/brine, dried (MgSO4), filtered, and concentrated under reduced pressure leaving a residue. Product was purified by silica gel column chromatography (0-10% Methanol in Dichloromethane) and then prep HPLC (15-100% Acetonitrile (with 0.1% trifluoroacetic acid) in water (with 0.1% trifluoroacetic acid)) to yield compound 11 (61 mg, 58%) as a white solid, trifluoroacetate salt, after lyophilization.

1. customReaction mixture
2. stirringstirred at room temperature for 24 hours under argon
3. extractionextracted three times with 40 mL of ethyl acetate
4. washThe combined organic layers were washed with 50 mL of 1:1 water/brine
5. dry with materialdried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customleaving a residue
9. customProduct was purified by silica gel column chromatography (0-10% Methanol in Dichloromethane)