Triethylamine → (3R)-3-[2-Benzyl-6-[(3R,4R)-3-hydroxy-4-methoxypyrrolidine-1-yl]-3-pyridyl)ethynyl-3-quinuclidinol

Beteiligte Stoffe

Reaktionsschritte

A mixture of 4.19 g of 2-benzyl-3-iodo-6-[(3R,4R)-3-hydroxy-4-methoxypyrrolidine-1-yl]pyridine, 1.7 g of (3R)-3-ethynyl-3-quinuclidinol, 500 mg of tetrakis(triphenylphosphine)palladium(0), 10 mg of cuprous iodide, 4.2 ml of triethylamine and 13 ml of N,N-dimethylformamide was heated under stirring in an oil bath kept at 70° C. for 3 hours in a nitrogen atmosphere. After cooling as it was, the mixture was extracted with ethyl acetate-dilute aqueous ammonia. The organic phase was washed with water and brine, dried over anhydrous magnesium sulfate and evaporated. The residue was subjected to NH-silica gel column chromatography and eluted with 20-100% ethyl acetate/hexane and then with 5% methanol/ethyl acetate, to give 1.54 g of the target compound.

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