反应详情

Into a 25-mL round-bottom flask, was placed a solution of 4-(1-(3-(2-(azetidin-3-yl)-4-methyl-1H-imidazol-5-yl)-4-methylbenzoyl)azetidin-3-yl)benzonitrile (compound 189.2, 100 mg, 0.24 mmol) in N,N-dimethylformamide (2 mL). Methyl chloroformate (33 μL, 0.42 mmol) and triethylamine (34 μL, 0.25 mmol) were added to the reaction. The reaction mixture was stirred for 2 h at room temperature, then was quenched with 10 mL of water. The aqueous phase was extracted with 3×5 mL of ethyl acetate. The combined organic layers were washed with 3×3 mL of brine and concentrated under reduced pressure. The residue was purified by silica gel chromatography with dichloromethane/methanol (10:1). The crude product (100 mg) was purified by Prep-HPLC with the following conditions (Prep-HPLC-020): Column, SunFire Prep C18 OBD Column, 5 μm, 19*150 mm; mobile phase, Water with 50 mmol NH4HCO3 and MeCN (33.0% MeCN up to 45.0% in 7 min, up to 100.0% in 2 min, down to 33.0% in 1 min); Detector, Waters 2489, 254 and 220 nm. This resulted in 21.5 mg (19%) of the title compound as a white solid. m/z (ES+) 470 (M+H)+.

1. customInto a 25-mL round-bottom flask, was placed
2. customwas quenched with 10 mL of water
3. extractionThe aqueous phase was extracted with 3×5 mL of ethyl acetate
4. washThe combined organic layers were washed with 3×3 mL of brine
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by silica gel chromatography with dichloromethane/methanol (10:1)
7. customThe crude product (100 mg) was purified by Prep-HPLC with the following conditions (Prep-HPLC-020)
8. waitup to 100.0% in 2 min
9. waitdown to 33.0% in 1 min)