Water → 7-(2,4-Dichlorophenyl)-2-ethylpyrazolo[1,5-a]pyridine

HRID 1864984

反応式

HRID 1864984 の反応式
Br[C:2]1[N:7]2[N:8]=[C:9]([CH2:11][CH3:12])[CH:10]=[C:6]2[CH:5]=[CH:4][CH:3]=1.[Cl:13][C:14]1[CH:19]=[C:18]([Cl:20])[CH:17]=[CH:16][C:15]=1OB(O)O.C(=O)([O-])[O-].[Na+].[Na+].O>C(O)C.C1(C)C=CC=CC=1.C(OCC)(=O)C>[Cl:13][C:14]1[CH:19]=[C:18]([Cl:20])[CH:17]=[CH:16][C:15]=1[C:2]1[N:7]2[N:8]=[C:9]([CH2:11][CH3:12])[CH:10]=[C:6]2[CH:5]=[CH:4][CH:3]=1

参加物

8

反応物 4

HCID 962WaterHCID 10340Sodium CarbonateHCID 219844772,4-Dichlorophenylboric acidHCID 219845107-Bromo-2-ethylpyrazolo[1,5-a]pyridine

生成物 1

HCID 219846357-(2,4-Dichlorophenyl)-2-ethylpyrazolo[1,5-a]pyridine収率 97.9%

試薬・触媒・溶媒 3

HCID 702Ethanol溶媒HCID 1140Toluene溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
80 °C

実験手順

After dissolving 7-bromo-2-ethylpyrazolo[1,5-a]pyridine (300 mg) in ethanol (2 mL) and toluene (4 mL), 2,4-dichlorophenylboric acid (508 mg), tetrakis(triphenylphosphine)palladium(0) complex (154 mg) and 2M aqueous sodium carbonate (1.33 mL) were added and the mixture was heated and stirred at 80° C. for 3 hours under a nitrogen stream. Water was added to the reaction mixture, extraction was performed with ethyl acetate and the organic layer washed with brine. After drying over anhydrous magnesium sulfate and filtration, the solvent was concentrated under reduced pressure, the residue was purified by silica gel column chromatography, and the title compound (380 mg) was obtained from the n-hexane:ethyl acetate (100:1) fraction as a light yellow oil.

後処理

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

出典と根拠

ORDレコード
ord-9ebccb9cd1444728a1c2ac38f400d908
出典データセット
uspto-grants-2009_12
特許番号
US07625925B2

関連ノート

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