Water → (S)-Diethyl (7,8-Difluoro-3-Methyl-3,4-Dihydro-2H-[1,4]Benzoxazin-4-Yl)Methylene-Malonate

HRID 8477

반응식

HRID 8477 반응식
[OH-].[K+].F[C:4]1[C:26]([F:27])=[C:25]([F:28])[CH:24]=[CH:23][C:5]=1[N:6]([CH:11]=[C:12]([C:18]([O:20][CH2:21][CH3:22])=[O:19])[C:13]([O:15][CH2:16][CH3:17])=[O:14])[C@@H:7]([CH3:10])[CH2:8][OH:9].C(OC=C(C(OCC)=O)C(OCC)=O)C.O>[Cl-].C([N+](C)(C)C)C1C=CC=CC=1.CN(C=O)C>[F:28][C:25]1[CH:24]=[CH:23][C:5]2[N:6]([CH:11]=[C:12]([C:18]([O:20][CH2:21][CH3:22])=[O:19])[C:13]([O:15][CH2:16][CH3:17])=[O:14])[C@@H:7]([CH3:10])[CH2:8][O:9][C:4]=2[C:26]=1[F:27]

참가 물질

7

반응물 4

HCID 962WaterHCID 6871Diethyl (ethoxymethylene)malonateHCID 14797Potassium HydroxideHCID 11485652Diethyl [2,3,4-trifluoro[(1S)-2-hydroxy-1-methylethyl]anilino]methylenemalonate

생성물 1

HCID 11089557(S)-Diethyl (7,8-Difluoro-3-Methyl-3,4-Dihydro-2H-[1,4]Benzoxazin-4-Yl)Methylene-Malonate

시약·촉매·용매 2

HCID 5963Benzyltrimethylammonium chloride촉매HCID 6228Dimethylformamide용매2회

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온도
70 °C

실험 절차

Potassium hydroxide (180 mg) and benzyltrimethylammonium chloride (49.5 mg) were dissolved in DMF (15 ml) by heating to 70° C. and a solution of diethyl [2,3,4-trifluoro[(1S)-2-hydroxy-1-methylethyl]anilino]methylenemalonate (1 g, 99.8% ee) and diethyl ethoxymethylenemalonate (120 mg) in DMF (5 ml) was added thereto. The obtained mixture was stirred at the same temperature for 4 hours. After adding water, the liquid reaction mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate. After evaporating the solvent, the obtained residue was subjected to silica gel column chromatography. Thus, 871 mg (99.8% ee) of the title compound was obtained as a yellow oily substance. Various spectral data was identical with those described in Japanese Patent No. 2,769,174.

후처리

  1. customthe liquid reaction mixture
  2. extractionwas extracted with ethyl acetate
  3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
  4. customAfter evaporating the solvent

출처 및 근거

ORD 기록
ord-cb07df41301c4fcea44fcee88458c19b
출처 데이터셋
uspto-grants-2006_08
특허 번호
US07087778B2

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