Triethylborane → 4-[1-Ethyl-4-(4-fluoro-phenyl)-5-trifluoromethyl-1H-pyrazol-3-yl]-benzenesulfonamide

HRID 377694ノート

反応式

HRID 377694 の反応式
[CH2:1]([N:3]1[C:7]([C:8]([F:11])([F:10])[F:9])=[C:6]([C:12]2[CH:17]=[CH:16][C:15]([F:18])=[CH:14][CH:13]=2)[C:5]([C:19]2[CH:24]=[CH:23][C:22]([S:25](C)(=[O:27])=[O:26])=[CH:21][CH:20]=2)=[N:4]1)[CH3:2].C([Mg]Cl)CCC.C(B(CC)CC)C.C([O-])(=O)C.[Na+].[NH2:47]OS(O)(=O)=O>C1COCC1.O>[CH2:1]([N:3]1[C:7]([C:8]([F:11])([F:10])[F:9])=[C:6]([C:12]2[CH:17]=[CH:16][C:15]([F:18])=[CH:14][CH:13]=2)[C:5]([C:19]2[CH:24]=[CH:23][C:22]([S:25]([NH2:47])(=[O:27])=[O:26])=[CH:21][CH:20]=2)=[N:4]1)[CH3:2]

参加物

8

反応物 5

HCID 7357TriethylboraneHCID 76284hydroxylamine-O-sulfonic acidHCID 517045Sodium AcetateHCID 98445471-Ethyl-4-(4-fluoro-phenyl)-3-(4-methanesulfonyl-phenyl)-5-trifluoromethyl-1H-pyrazoleHCID 178418265HCID 178418265、化合物

生成物 1

HCID 102234614-[1-Ethyl-4-(4-fluoro-phenyl)-5-trifluoromethyl-1H-pyrazol-3-yl]-benzenesulfonamide収率 62%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒3 回

反応条件

温度
25 °C

実験手順

1-Ethyl-4-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)-1H-pyrazole (0.45 g, 1.0 mmol) was dissolved in 5 mL dry THF under nitrogen and treated with 0.9 mL of a 1.0 M solution of n-butyl magnesium chloride in THF at 0° C. for 10 minutes and warmed to 25° C. for 30 minutes. A solution of triethylborane in THF (2.5 mL, 1.0 M) was added and the mixture was stirred at 25° C. for 2 hours and at reflux for 24 hours. After cooling to 25° C., a mixture of water (1.2 mL), sodium acetate (0.90 g) and hydroxylamine-O-sulfonic acid (0.62 g) was added and the reaction stirred at 25° C. for 18 hours. The mixture was partitioned between water and ethyl acetate, and the organic layer washed successively with water and brine, dried over MgSO4 and concentrated in vacuo. Chromatographic purification on silica gel eluting with methyl t-butyl ether/toluene (5/95) gave 4-[1-ethyl-4-(4-fluorophenyl)-5-(trifluoromethyl)-1H-pyrazol-3-yl]benzenesulfonamide as a white solid (0.25 g, 62% yield). Elemental analysis for C18H15N3F4SO2Calc'd: C, 52.30, H, 3.66, N, 10.16, S, 7.76. Found: C, 52.36, H, 3.72, N, 9.98, S, 7.90.

後処理

  1. temperatureat reflux for 24 hours
  2. temperatureAfter cooling to 25° C.
  3. additionwas added
  4. stirringthe reaction stirred at 25° C. for 18 hours
  5. customThe mixture was partitioned between water and ethyl acetate
  6. washthe organic layer washed successively with water and brine
  7. dry with materialdried over MgSO4
  8. concentrationconcentrated in vacuo
  9. customChromatographic purification on silica gel eluting with methyl t-butyl ether/toluene (5/95)

出典と根拠

ORDレコード
ord-054b835dd14f46448d38e3f7a5c9503b
出典データセット
uspto-grants-2000_02
特許番号
US06028072

反応ノート

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