Water → ethyl (2E)-3-(5-fluoro-2-methyl-2H-indazol-4-yl)acrylate

HRID 1639781노트

반응식

HRID 1639781 반응식
[H-].[Na+].C(OP([CH2:11][C:12]([O:14][CH2:15][CH3:16])=[O:13])(OCC)=O)C.[F:17][C:18]1[CH:26]=[CH:25][C:24]2[C:20](=[CH:21][N:22]([CH3:27])[N:23]=2)[C:19]=1[CH:28]=O.O>O1CCCC1>[F:17][C:18]1[CH:26]=[CH:25][C:24]2[C:20](=[CH:21][N:22]([CH3:27])[N:23]=2)[C:19]=1/[CH:28]=[CH:11]/[C:12]([O:14][CH2:15][CH3:16])=[O:13]

참가 물질

6

반응물 4

HCID 962WaterHCID 13345Triethyl phosphonoacetateHCID 24758Sodium hydrideHCID 593346015-fluoro-2-methyl-2H-indazole-4-carbaldehyde

생성물 1

HCID 66720771ethyl (2E)-3-(5-fluoro-2-methyl-2H-indazol-4-yl)acrylate수율 98.3%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매3회

실험 절차

To a suspension of sodium hydride (0.88 g, 21.9 mmol) in tetrahydrofuran (20 mL) was added a solution of ethyl diethylphosphonoacetate (4.38 mL, 21.9 mmol) in tetrahydrofuran (5 mL) at 0° C., and the mixture was stirred for 20 min. To the reaction mixture was added a solution of 5-fluoro-2-methyl-2H-indazole-4-carbaldehyde (3.0 g, 16.8 mmol) in tetrahydrofuran (8.7 mL), and the mixture was warmed to room temperature over 4 hr. Water was added and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by flash silica gel column chromatography (ethyl acetate/hexane=1/3) to give the title compound (4.10 g, yield 98%)

후처리

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. customthe solvent was evaporated under reduced pressure
  5. customThe residue was purified by flash silica gel column chromatography (ethyl acetate/hexane=1/3)

출처 및 근거

ORD 기록
ord-4d6073c544fa4fcfa23c5421ad33691b
출처 데이터셋
uspto-grants-2012_02
특허 번호
US08110585B2

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