反应详情

To a mixture of 2-chloro-5-hydroxybenzaldehyde (200 mg, 1.27 mmol, intermediate 28a) and morpholine (280 mg, 3.21 mmol) in methanol (10 mL) was added 2 drops of acetic acid and the mixture was stirred at room temperature for 2 h. To the mixture, sodium borohydride (97 mg, 2.56 mmol) was added and the resulting mixture was stirred at room temperature for 4 h. The mixture was quenched with dilute hydrochloride acid and concentrated to give crude product. This crude material was purified by silica gel chromatography eluting with petroleum ether/ethyl acetate (5:1 to 1:1) to give 4-chloro-3-(morpholinomethyl)phenol (150 mg, 51.8% yield) as white solid. LCMS retention time 0.378; LCMS MH+ 228.

1. stirringthe resulting mixture was stirred at room temperature for 4 h
2. customThe mixture was quenched with dilute hydrochloride acid
3. concentrationconcentrated
4. customto give crude product
5. customThis crude material was purified by silica gel chromatography
6. washeluting with petroleum ether/ethyl acetate (5:1 to 1:1)