反应详情

5-(2-Azabicyclo[2.2.2]oct-5-en-5-yl)-1-(2,2-dimethylpropyl)-3-methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (2-5, 25 mg, 0.08 mmol, 1.0 equiv) was added to anhydrous DCM (0.80 mL). To this solution was added DIPEA (40 μL, 0.23 mmol, 3.0 equiv) and methanesulfonyl chloride (12 μL, 0.15 mmol, 2.0 equiv) and the resulting mixture was allowed to stir at room temperature for 10 min. Following this duration, LCMS showed consumption of starting material. Saturated NaHCO3 (3 mL) and ethyl acetate (3 mL) were then added and the layers were separated. The aqueous layer was back-extracted with ethyl acetate (3×3 mL) and the combined organics were dried over Na2SO4, filtered and concentrated in vacuo to give a yellow oil. Purification by reverse-phase HPLC (10-100% CH3CN:0.1% TFA in H2O) afforded 4-1 as a white solid. MS m/z (M+H): calculated=405.1955; observed=405.1952.

1. customconsumption of starting material
2. additionSaturated NaHCO3 (3 mL) and ethyl acetate (3 mL) were then added
3. customthe layers were separated
4. extractionThe aqueous layer was back-extracted with ethyl acetate (3×3 mL)
5. dry with materialthe combined organics were dried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customto give a yellow oil
9. customPurification by reverse-phase HPLC (10-100% CH3CN:0.1% TFA in H2O)