反应详情

To a solution of potassium tert-butoxide (533 mg, 4.75 mmol) in tetrahydrofuran (10 ml) was added cyclohexylmethanol (594 mg, 5.20 mmol) in tetrahydrofuran (2.5 ml), methyl 2-(bromomethyl)-5-chlorobenzoate (250 mg, 0.95 mmol) in tetrahydrofuran (2.5 ml) at 0° C. The reaction mixture was stirred at room temperature for 2 hours. The resulting solution was acidified with 2 N hydrochloric acid solution (pH ca. 2) at 0° C. It was extracted with dichloromethane, the organic extracts were dried over sodium sulfate and concentrated to afford 302 mg of crude 5-chloro-2-[(cyclohexylmethoxy)methyl]benzoic acid. This carboxylic acid was converted into 132 mg (31%) of the title compound according to the procedure described in step 6 of Example 1:

1. extractionIt was extracted with dichloromethane
2. dry with materialthe organic extracts were dried over sodium sulfate
3. concentrationconcentrated