反应详情

To a solution of the title compound of example 42 (11.89 g, 25.03 mmol) in acetic acid (75 ml) was added p-anisaldehyde (6.09 ml, 50.06 mmol) dropwise. The reaction mixture was stirred at ambient temperature for 4 hours after which time it was cooled to 0° C. 10 ml of ammonia hydroxide was added followed by addition of ethyl acetate. After separation, the organic layer was washed with brine, dried over MgSO4 and concentrated under vacuum to yield the crude product. It was chromatographed on silica gel with MeOH—CHCl3—NH4OH (1:99:0.1 to 5:95:0.1) as eluents to afford the title compound of Example 43A as a white solid (11.58 g, 78% yield).

1. temperaturewas cooled to 0° C
2. customAfter separation
3. washthe organic layer was washed with brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated under vacuum
6. customto yield the crude product
7. customIt was chromatographed on silica gel with MeOH—CHCl3—NH4OH (1:99:0.1 to 5:95:0.1) as eluents