Methanol → 7-[(R)-2-((E)-3-hydroxy-oct-1-enyl)-6-oxo-piperidin-1-yl]-hept-5-ynoic acid methyl ester

Participants

Reaction Steps

Sodium borohydride (35 mg, 0.93 mmol), followed by MeOH (0.25 mL), was added to a solution of 7-[(R)-2-oxo-6-((E)-3-oxo-oct-1-enyl)-piperidin-1-yl]-hept-5-ynoic acid methyl ester (68 mg, 0.19 mmol) in CH2Cl2 (1.0 mL) at 0° C. The mixture was allowed to warm to rt. After 1 h at rt, the reaction was quenched with aqueous HCl (1.0 M, 3 mL) and extracted with EtOAc (3×10 mL). The combined organic phase was washed with brine (20 mL) then dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient) afforded 26 mg (38%) of 7-[(R)-2-((E)-3-hydroxy-oct-1-enyl)-6-oxo-piperidin-1-yl]-hept-5-ynoic acid methyl ester and 5.3 mg (8%) of (R)-1-(7-hydroxy-hept-2-ynyl)-6-((E)-3-hydroxy-oct-1-enyl)-piperidin-2-one.

Provenance & Evidence