Hydrochloric Acid → HCID 22145935, compound

Participants

Reaction Steps

In a nitrogen stream, an n-butyllithium hexane solution (2.71 M, 3.8 mL) was added dropwise to a solution of 1-benzyloxy-2-bromobenzene (2.5 g, 9.5 mmol) in THF (90 mL) at −78° C. and the mixture solution was stirred at the same temperature for 30 minutes. To this mixture, a solution of 4-ethoxybenzaldehyde (1.29 mL, 1.86 mmol) in THF (30 mL) was added dropwise at −78° C. The reaction mixture was stirred at the same temperature for two hours, and then water was added thereto and the mixture was extracted with ethyl acetate. The organic layer was washed with a saturated sodium chloride aqueous solution and dried (anhydrous magnesium sulfate), and then the solvent was distilled under reduced pressure and the obtained residue was treated by silica gel column chromatography [developing solution=ethyl acetate:n-hexane (1:5)]. To a methanol solution (26.8 mL) of the obtained crude product, a 20% palladium hydroxide catalyst (147 mg) was added and furthermore 36% HCl (0.4 mL) was added thereto. The mixture was stirred under a hydrogen atmosphere for 24 hours, and then the catalyst was filtered off. The solvent was distilled under reduced pressure and the obtained residue was purified by silica gel column chromatography [developing solution=ethyl acetate:n-hexane (1:5)] to obtain the title compound (828.1 mg, 38%).

Provenance & Evidence