Sodium Carbonate → (S)-methyl 6-(1-(3-(benzyloxy)cyclobutyl)-1H-pyrazol-4-yl)-5-cyclobutoxy-2-methyl-3,4-dihydroquinoline-1(2H)-carboxylate

温度

80 °C

A 25-mL round-bottom flask was charged with (S)-methyl 5-cyclobutoxy-2-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydroquinoline-1(2H)-carboxylate (0.100 g, 0.25 mmol), 1-(3-(benzyloxy)cyclobutyl)-4-iodo-1H-pyrazole (0.106 g, 0.30 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane adduct (0.020 g, 0.02 mmol), sodium carbonate (0.053 g, 0.50 mmol), 1,4-dioxane (10 mL) and water (3 mL). The resulting mixture was stirred overnight at 80° C., and then cooled to room temperature. The reaction mixture was diluted with ethyl acetate (20 mL), washed with water (10 mL) and brine (10 mL), dried over anhydrous sodium sulfate, filtered, and concentrated under vacuum. The residue was purified via column chromatography on silica gel (gradient elution with 1-10% ethyl acetate/petroleum ether) to afford (S)-methyl 6-(1-(3-(benzyloxy)cyclobutyl)-1H-pyrazol-4-yl)-5-cyclobutoxy-2-methyl-3,4-dihydroquinoline-1(2H)-carboxylate (0.060 g, 48%) as a yellow solid. MS (ESI, pos. ion) m/z 502 [M+H]+.

1. temperaturecooled to room temperature
2. washwashed with water (10 mL) and brine (10 mL)
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated under vacuum
6. customThe residue was purified via column chromatography on silica gel (gradient elution with 1-10% ethyl acetate/petroleum ether)

ORDレコード

ord-3cf1a7ef1b294e01a6bfdc82d623ad58

出典データセット

uspto-grants-2016_07

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09388161B2