Triethylamine → (5-(4-Methoxy-2,6-dimethylphenylsulfonyl)-4,5,6,7-tetrahydrothieno-[3,2-c]pyridin-2-yl)(9-(pyridin-4-yl)-3,9-diazaspiro[5.5]undecan-3-yl)methanone

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Reaction Steps

(9-(Pyridin-4-yl)-3,9-diazaspiro[5.5]undecan-3-yl)(4,5,6,7-tetrahydrothieno[3,2-c]-pyridin-2-yl)methanone hydrochloride (89 mg, 0.208 mmol) was dissolved in dichloromethane (5 ml) and cooled, and triethylamine (0.07 ml, 0.52 mmol) was added thereto. At 0° C., a solution of 4-methoxy-2,6-dimethylbenzenesulfonyl chloride (50 mg, 0.208 mmol) in dichloromethane (5 ml) was added dropwise, and then stirring was carried out for 15 h at room temperature. Saturated sodium hydrogen carbonate solution (10 ml) was added, the mixture was stirred for 15 min. and the phases were separated. The aqueous phase was extracted with dichloromethane (30 ml), and then the combined organic phases were washed with saturated sodium chloride solution, dried over sodium sulfate and concentrated in vacuo. The crude product was purified by column chromatography (silica gel, ethyl acetate/methanol/-ammonia (25% aq.), 400:20:1). Yield: 70 mg (56%). MS, R=3.4 min; m/z=595.3 [MH]+

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