Potassium Carbonate → Tert-butyl [2-[2-[4-(diphenylmethoxy)-1-piperidinyl]ethyl]-2,3-dihydro-2,4,6,7-tetramethylbenzofuran-5-yl]carbamate

Participants

Reaction Conditions

Reaction Steps

A suspension of tert-butyl [2-(2-bromoethyl)-2,3-dihydro-2,4,6,7-tetramethylbenzofuran-5-yl]carbamate (1.2 g), 4-(diphenylmethoxy)piperidine (0.85 g), and potassium carbonate (0.44 g) in N,N-dimethylformamide (20 mL) was stirred at 60° C. for 15 hours. This reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with saturated aqueous NaCl, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/methanol=98:2 to 95:5) to provide 1.6 g of the title compound. Yield 92%.

Provenance & Evidence