反应详情

温度

0 °C

To a well-stirred suspension of 2.0 g (52.7 mmol) of sodium borohydride in 65 mL of ethyl alcohol at 0° C. under a nitrogen atmosphere, was slowly added 15 g (61.9 mmol) of 2-benzyloxy-3-methoxybenzaldehyde, from Step 1, in 100 mL of ethyl alcohol. The reaction mixture was stirred at 0° C. for 10 minutes and then 50 mL of water was added to quench the reaction, followed by 50 mL of diethyl ether. The mixture was slowly added to 60 mL of 10% aqueous hydrochloric acid solution at 0° C. and the resultant mixture was stirred for 1 h and then extracted with 3×200 mL of diethyl ether. The combined ether extracts were washed with aqueous sodium bicarbonate solution, water and brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to give 15.14 g (100% yield) of the title compound as a white solid.

1. customto quench
2. customthe reaction
3. extractionextracted with 3×200 mL of diethyl ether
4. washThe combined ether extracts were washed with aqueous sodium bicarbonate solution, water and brine
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo