Hydrochloric Acid → N-methyl-2-{2-[5-{[6-(Methylsulfonyl)pyridin-3-yl]oxy}-7-(tetrahydro-2H-pyran-4-yloxy)-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-5-yl}acetamide

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Reaction Steps

To a solution of (2-[5-{[6-(methylsulfonyl)pyridin-3-yl]oxy}-7-(tetrahydro-2H-pyran-4-yloxy)-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-5-yl]acetic acid (365 mg) in N,N-dimethylformamide (5 mL) were added 1-hydroxybenzotriazole monohydrate (158 mg), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (198 mg), methylamine hydrochloride (70 mg), and triethylamine (0.144 mL), and the mixture was stirred at room temperature for 1 hr. 1N HCl was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium hydrogen carbonate solution and saturated brine, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The obtained crude product was subjected to basic silica gel column chromatography (ethyl acetate:hexane=0:100 to 100:0, volume ratio), and crystallized from acetonitrile. The obtained crystals were recrystallized from ethyl acetate and diethyl ether to give the title compound (115 mg, yield 31%) as white powder.

Provenance & Evidence