反应详情

A solution of Example 49G (0.250 g, 0.510 mmol), mesyl chloride (0.158 mL, 2.04 mmol), and pyridine (0.330 mL, 4.08 mmol) in acetone (3 mL) was stirred at 25° C. for 18 hours. The solution was partitioned between ethyl acetate and dilute citric acid and the layers were separated. The ethyl acetate layer was dried with sodium sulfate, filtered, and concentrated in vacuo. The residue was chromatographed on silica gel eluting with methylene chloride and 2.5% methanol in methylene chloride to give a yellow solid.

1. customThe solution was partitioned between ethyl acetate and dilute citric acid
2. customthe layers were separated
3. dry with materialThe ethyl acetate layer was dried with sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was chromatographed on silica gel eluting with methylene chloride and 2.5% methanol in methylene chloride
7. customto give a yellow solid