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

HRID 260951

반응식

HRID 260951 반응식
[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]

참가 물질

5

반응물 3

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

생성물 1

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

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

반응 조건

온도
25 °C

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-b5c57dd44803470887d10613526c981d
출처 데이터셋
uspto-grants-1996_06
특허 번호
US05530126

연결된 노트

불러오는 중…