Ethyl Acetate → tert-butyl N-[7-(2,4-dimethoxy-6-methylphenyl)-2-methoxypyrazolo[1,5-a]pyridin-3-yl]carbamate

HRID 1181903ノート

反応式

HRID 1181903 の反応式
Br[C:2]1[N:7]2[N:8]=[C:9]([O:19][CH3:20])[C:10]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[C:6]2[CH:5]=[CH:4][CH:3]=1.[CH3:21][C:22]1[C:27](OB(O)O)=[C:26]([O:32][CH3:33])[CH:25]=[C:24]([O:34][CH3:35])[CH:23]=1.O.O.O.O.O.O.O.O.[OH-].[Ba+2].[OH-].C(OCC)(=O)C>COCCOC.O>[CH3:35][O:34][C:24]1[CH:25]=[C:26]([O:32][CH3:33])[CH:27]=[C:22]([CH3:21])[C:23]=1[C:2]1[N:7]2[N:8]=[C:9]([O:19][CH3:20])[C:10]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[C:6]2[CH:5]=[CH:4][CH:3]=1

参加物

7

反応物 4

HCID 8857Ethyl AcetateHCID 17749109Barium hydroxide, octahydrateHCID 21984642tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)carbamateHCID 219847402,4-Dimethoxy-6-methylphenylboric acid

生成物 1

HCID 21984512tert-butyl N-[7-(2,4-dimethoxy-6-methylphenyl)-2-methoxypyrazolo[1,5-a]pyridin-3-yl]carbamate収率 63.4%

試薬・触媒・溶媒 2

HCID 962Water溶媒2 回HCID 80711,2-Dimethoxyethane溶媒

反応条件

温度
80 °C

実験手順

After dissolving tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)carbamate (300 mg) in 1,2-dimethoxyethane (10 mL) and water (5 mL), 6-methyl-2,4-dimethoxyphenylboric acid (258 mg), tetrakis (triphenylphosphine)palladium (0) complex (203 mg) and barium hydroxide octahydrate (415 mg) were added and the mixture was heated and stirred at 80° C. for 3 hours. Water was added to the reaction mixture, extraction was performed with ethyl acetate and the extract was washed with brine. After drying the obtained organic layer over anhydrous magnesium sulfate and filtering it, the solvent was concentrated under reduced pressure, the residue was purified by silica gel column chromatography, and the title compound (230 mg) was obtained from the n-hexane:ethyl acetate (5:1) fraction as a brown oil.

後処理

  1. additionwere added
  2. temperaturethe mixture was heated
  3. washthe extract was washed with brine
  4. dry with materialAfter drying the obtained organic layer over anhydrous magnesium sulfate
  5. filtrationfiltering it
  6. concentrationthe solvent was concentrated under reduced pressure
  7. customthe residue was purified by silica gel column chromatography

出典と根拠

ORDレコード
ord-7e6a108022ba4b35a8ac5274d5fcd082
出典データセット
uspto-grants-2007_10
特許番号
US07285666B2

反応ノート

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