Hydrochloric Acid → HCID 391156, compound

Participants

Reaction Conditions

Reaction Steps

A solution of KOH (0.25 g, 4.46 mmol) in water (4.4 mL) was added to 4-fluoro-benzaldehyde Compound 3a (1.07 mL, 10 mmol) and the suspension was heated to 65° C. Cycloheptanone Compound 1a (1.18 mL, 10 mmol) was added dropwise over a period of 15 mins. The mixture was refluxed for 5 hrs, then stirred overnight at room temperature. The reaction mixture was acidified with 1N HCl (26 mL) and extracted with EtOAc (100 mL). The organic layer was washed with brine and dried over Na2SO4, then filtered and concentrated. The resulting yellow residue was purified on a silica gel column (using with 6% EtOAc/Hexane) to give 2-(4-fluoro-benzylidene)-cycloheptanone Compound 3b (1.1 g, 50.4%).

Provenance & Evidence