Dimethylformamide → 3-methyl-5-(4-nitrobenzyl)-1,3,4-oxadiazol-2(3H)-one

HRID 30668노트

반응식

HRID 30668 반응식
[N+:1]([C:4]1[CH:16]=[CH:15][C:7]([CH2:8][C:9]2[O:13][C:12](=[O:14])[NH:11][N:10]=2)=[CH:6][CH:5]=1)([O-:3])=[O:2].IC.[CH3:19]N(C)C=O.[H-].[Na+]>O>[CH3:19][N:11]1[N:10]=[C:9]([CH2:8][C:7]2[CH:15]=[CH:16][C:4]([N+:1]([O-:3])=[O:2])=[CH:5][CH:6]=2)[O:13][C:12]1=[O:14]

참가 물질

6

반응물 4

HCID 6228DimethylformamideHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 218227135-(4-nitrobenzyl)-1,3,4-oxadiazol-2(3H)-one

생성물 1

HCID 218134333-methyl-5-(4-nitrobenzyl)-1,3,4-oxadiazol-2(3H)-one수율 71%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

To a mixture of 5-(4-nitrobenzyl)-1,3,4-oxadiazol-2(3H)-one (1.0 g), iodomethane (0.97 g) and N,N-dimethylformamide (30 mL) was added sodium hydride (60% in oil, 0.20 g) at room temperature. The reaction mixture was stirred at room temperature for 2 hrs. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to give 3-methyl-5-(4-nitrobenzyl)-1,3,4-oxadiazol-2(3H)-one as colorless crystals (0.75 g, yield 71%) from a fraction eluted with hexane-ethyl acetate (3:1-2:1, v/v). Recrystallization thereof from ethyl acetate-hexane gave colorless prism crystals. melting point: 115-116° C.

후처리

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated

출처 및 근거

ORD 기록
ord-1f863b11ca6549b9894b65617e04ced5
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07423159B2

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