反应详情

4,4-Dimethylchroman-7-ol (1.4 g, 8.0 mmol), potassium carbonate (3.3 g, 24.0 mmol) and ethyl bromoacetate (1.0 mL, 9.2 mmol) were treated in the same procedure described in Example 33(d). The crude residue was applied to a silica gel chromatography column and eluted with a volume mixture of hexane and ethyl acetate (19/1 to 4/1) to furnish 2.1 g (98% yield) of the title compound as a colorless oil.

1. washeluted with a volume mixture of hexane and ethyl acetate (19/1 to 4/1)