Potassium Carbonate → Methyl 3-[4-(2-butoxyethoxy)phenyl]-10-propyl-7,8,9,10-tetrahydropyrido[2,3-b]azocine-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

A suspension of methyl 3-bromo-10-propyl-7,8,9,10-tetrahydropyrido[2,3-b]azocine-6-carboxylate (820 mg), 4-(2-butoxyethoxy)phenylboric acid (748 mg) and potassium carbonate (868 mg) in toluene (15 ml), ethanol (1.5 ml) and water (1.5 ml) was stirred under an argon atmosphere for 30 minutes. Tetrakis(triphenylphosphine)palladium (140 mg) was added thereto, and the mixture was heated at 115° C. for 6 hours under an argon atmosphere, which was allowed to cool. Water was added and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was distilled off under reduced pressure and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=19:1→hexane:ethyl acetate=4:1) to give methyl 3-[4-(2-butoxyethoxy)phenyl]-10-propyl-7,8,9,10-tetrahydropyrido[2,3-b]azocine-6-carboxylate (870 mg) as a yellow oily material.

Provenance & Evidence