Acetic Acid → 6-[(E)-2-cyclopentyl-1-{4-[(1-ethylazetidin-3-yl)sulfanyl]phenyl}ethenyl]-2-methoxy-3-methylpyridine

Participants

Reaction Steps

90% acetaldehyde (31 μL) and acetic acid were added to a solution of 6-{(E)-1-[4-(azetidin-3-ylsulfanyl)phenyl]-2-cyclopentylethenyl}-2-methoxy-3-methylpyridine in chloroform (2 mL), and the mixture was stirred at room temperature for 30 minutes. The reaction solution was cooled and sodium triacetoxyborohydride (206 mg) was added, after which the mixture was stirred at room temperature for 30 minutes. The reaction solution was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and filtered. The solvent was then evaporated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform:methanol=100:0→93:7) to give 6-[(E)-2-cyclopentyl-1-{4-[(1-ethylazetidin-3-yl)sulfanyl]phenyl}ethenyl]-2-methoxy-3-methylpyridine as a colorless oil (78 mg, 58%).

Provenance & Evidence