Ethyl Acetate → 4-(Difluoromethoxy)benzonitrile
반응식
[C:1]([C:3]1[CH:8]=[CH:7][C:6]([OH:9])=[CH:5][CH:4]=1)#[N:2].Cl[C:11]([F:17])([F:16])C(OC)=O.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>CN(C=O)C>[F:16][CH:11]([F:17])[O:9][C:6]1[CH:7]=[CH:8][C:3]([C:1]#[N:2])=[CH:4][CH:5]=1참가 물질
6
실험 절차
4-Cyanophenol (0.12 G, 1.0 mmol, Aldrich), methyl chlorodifluoroacetate (0.29 g, 2.0 mmol, Aldrich) and potassium carbonate (0.29 g, 2.1 mmol) were combined in dry DMF (0.5 mL) under an argon atmosphere. After stirring at 75°-80° C. for 0.3 h, the mixture was cooled to RT, ethyl acetate (20 mL) was added and the organic layer was washed twice with 10% NaOH. The organic extract was dried (MgSO4), filtered and evaporated. The residue was purified by flash chromatography (silica gel, 20% ether/hexanes) to provide the title compound as a colorless solid (0.09 g, 53%). mp 34°-35° C.
후처리
- washthe organic layer was washed twice with 10% NaOH
- extractionThe organic extract
- dry with materialwas dried (MgSO4)
- filtrationfiltered
- customevaporated
- customThe residue was purified by flash chromatography (silica gel, 20% ether/hexanes)
출처 및 근거
- ORD 기록
- ord-4972bb959a7b4018a8ed305bf737462c
- 출처 데이터셋
- uspto-grants-1998_03
- 특허 번호
- US05731477
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