反应详情

To a suspension of LiAlH4 (8.8 g, 235 mmol) in dry THF (120 mL) was added a solution of 4-benzyloxy-6-fluoro-3-methyl-naphthalene-2-carboxylic acid methyl ester (25.4 g, 78.3 mmol) in THF (180 mL) dropwise at 0° C. under nitrogen. The reaction mixture was stirred at room temperature for 3 hours. After this time, the reaction mixture was cooled to 0° C. and quenched carefully by addition of cold water (10 mL) followed by 15% NaOH solution (10 mL) and additional water. The resulting solution was stirred for one hour, then filtered through a sintered glass funnel. The filter pad was washed with THF (50 mL). The combined filtrates were dried over Na2SO4, filtered, and concentrated to afford (4-benzyloxy-6-fluoro-3-methyl-naphthalen-2-yl)-methanol (21.5 g, 92%, crude) as a white solid. The crude product was used in the next step without further purification. MS calcd. for C19H16FO2 [(M−H)−] 295, obsd. 294.9.

1. temperatureAfter this time, the reaction mixture was cooled to 0° C.
2. customquenched carefully by addition of cold water (10 mL)
3. stirringThe resulting solution was stirred for one hour
4. filtrationfiltered through a sintered glass funnel
5. washThe filter pad was washed with THF (50 mL)
6. dry with materialThe combined filtrates were dried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated