Sodium hydride → (4-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-5-fluoro-2-nitrophenoxy)acetic acid, butyl ester

HRID 260951

反応式

HRID 260951 の反応式
[Cl:1][C:2]1[C:3]([C:12]2[CH:17]=[C:16]([N+:18]([O-:20])=[O:19])[C:15](F)=[CH:14][C:13]=2[F:22])=[N:4][N:5]([CH3:11])[C:6]=1[C:7]([F:10])([F:9])[F:8].[C:23]([O:27][CH2:28][CH2:29][CH2:30][CH3:31])(=[O:26])[CH2:24][OH:25].[H-].[Na+]>C1COCC1>[Cl:1][C:2]1[C:3]([C:12]2[C:13]([F:22])=[CH:14][C:15]([O:25][CH2:24][C:23]([O:27][CH2:28][CH2:29][CH2:30][CH3:31])=[O:26])=[C:16]([N+:18]([O-:20])=[O:19])[CH:17]=2)=[N:4][N:5]([CH3:11])[C:6]=1[C:7]([F:10])([F:9])[F:8]

参加物

5

反応物 3

HCID 24758Sodium hydrideHCID 81882Butyl GlycolateHCID 152785734-chloro-3-(2,4-difluoro-5-nitrophenyl)-1-methyl-5-(trifluoromethyl)-1H-pyrazole

生成物 1

HCID 15278575(4-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-5-fluoro-2-nitrophenoxy)acetic acid, butyl ester収率 72%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
25 °C

実験手順

A solution of 3.4 g (0.01 mole) 4-chloro-3-(2,4-difluoro-5-nitrophenyl)-1-methyl-5-(trifluoro-methyl)-1H-pyrazole and 1.4 mL (0.011 mole) butyl glycolate in 25 mL anhydrous THF was chilled to 0° C. Maintaining the temperature below 5° C., 0.33 g (0.011 mole) NaH was added in portions. Once the addition was completed, the reaction mixture was allowed to warm to 25° C. After 3 hours the mixture was carefully quenched with water and extracted with ethyl acetate. The ethyl acetate extracts were washed with brine, dried over anhydrous MgSO4, and concentrated in vacuo. The residue was purified chromatographically with 20% ethyl acetate/hexanes to yield 3.25 g (72%) (4-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-5-fluoro-2-nitrophenoxy)acetic acid, butyl ester as a light yellow solid; mp 65° C.

後処理

  1. additionwas added in portions
  2. additionOnce the addition
  3. customAfter 3 hours the mixture was carefully quenched with water
  4. extractionextracted with ethyl acetate
  5. washThe ethyl acetate extracts were washed with brine
  6. dry with materialdried over anhydrous MgSO4
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified chromatographically with 20% ethyl acetate/hexanes

出典と根拠

ORDレコード
ord-b5c57dd44803470887d10613526c981d
出典データセット
uspto-grants-1996_06
特許番号
US05530126

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