反应详情

A mixture of 4-amino-8-(cyclopentyloxy)-7-methoxy-2H-chromen-2-one (100 mg, 0.36 mmol, Example 3, Step 1), Selectfluor (160 mg, 0.45 mmol), and acetonitrile (1.5 mL) were stirred vigorously for 18 h, concentrated, and then purified by silica gel chromatography (7:3→1:4; hexanes:ethyl acetate) to give 4-amino-8-(cyclopentyloxy)-3-fluoro-7-methoxy-2H-chromen-2-one: MS (ESI): 294.0.

1. concentrationconcentrated
2. custompurified by silica gel chromatography (7:3→1:4; hexanes:ethyl acetate)