2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-(cyclopent-2-enyl)-3-methyl-2-oxopiperidin-3-yl)acetaldehyde → 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-(cyclopent-2-enyl)-3-methyl-2-oxopiperidin-3-yl)acetic acid

Participants

Reaction Steps

To 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-(cyclopent-2-enyl)-3-methyl-2-oxopiperidin-3-yl)acetaldehyde (Example 102, Step E) (267 mg, 0.604 mmol) in acetone (4 mL) was added freshly prepared Jones reagent (0.5 mL) at rt. The reaction mixture was stirred at room temperature for 15 min. before it was diluted with EtOAc and washed with water and sat. aq. NaCl solution. The organic layer was dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (eluent: 50 to 100% EtOAc in hexanes) to give the title compound as a colorless film as a 3.6:1 mixture of diastereomers.

Provenance & Evidence