反应详情

Sodium borohydride (10 mg, 0.26 mmol) followed by EtOH (0.25 mL) was added to a solution of (4-{(R)-2-[(E)-4-(3-chlorophenyl)-3-oxo-but-1-enyl]-6-oxo-piperidin-1-yl}-butoxy)-acetic acid ethyl ester (110 mg, 0.25 mmol) in CH2Cl2 (1.0 mL) at 0° C. After 1 h at 0° C. the reaction was quenched with 1 N aqueous HCl. The reaction mixture was extracted with CH2Cl2 (3×10 mL), then the combined extracts were dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→2% MeOH/CH2Cl2) afforded 88 mg (80%) of (4-{(R)-2-[(E)-4-(3-chlorophenyl)-3-hydroxy-but-1-enyl]-6-oxo-piperidin-1-yl}-butoxy)-acetic acid ethyl ester.

1. customAfter 1 h at 0° C. the reaction was quenched with 1 N aqueous HCl
2. extractionThe reaction mixture was extracted with CH2Cl2 (3×10 mL)
3. dry with materialthe combined extracts were dried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification of the residue by flash column chromatography on silica gel (CH2Cl2→2% MeOH/CH2Cl2)