Hydrogen Bromide → 7-bromo-4-(bromoacetyl)-2H-chromen-2-one

HRID 1901131

반응식

HRID 1901131 반응식
[Br:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6]([C:13]([O:15]CC)=[CH2:14])=[CH:7][C:8](=[O:12])[O:9]2)=[CH:4][CH:3]=1.C1C(=O)N([Br:25])C(=O)C1.Br.OS([O-])=O.[Na+]>CC#N.O.C(OCC)(=O)C>[Br:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6]([C:13](=[O:14])[CH2:15][Br:25])=[CH:7][C:8](=[O:12])[O:9]2)=[CH:4][CH:3]=1

참가 물질

7

반응물 4

HCID 260Hydrogen BromideHCID 67184N-bromobutanimideHCID 233702047-bromo-4-(1-ethoxyvinyl)-2H-chromen-2-oneHCID 23665763Sodium Bisulfite

생성물 1

HCID 233702397-bromo-4-(bromoacetyl)-2H-chromen-2-one

시약·촉매·용매 2

HCID 8857Ethyl Acetate용매HCID 18373917Acetonitrile--water (1/1)용매

실험 절차

To a solution of vinyl ether from Step 1 (1.02 g) in CH3CN:H2O 4:1 (25 mL) were successively added NBS (0.82 g) and concentrated HBr (20 μL). After being stirred at r.t. for 4 h. The reaction mixture was treated with 5% aqueous NaHSO3 (1 mL). Ethyl acetate was then added and the organic phase was washed with saturated aqueous NaHCO3, H2O and brine, dried (MgSO4) and evaporated. Flash chromatography of the residue (silica gel; hexane/EtOAc (85:15)) afforded the title compound as a white solid.

후처리

  1. washthe organic phase was washed with saturated aqueous NaHCO3, H2O and brine
  2. dry with materialdried (MgSO4)
  3. customevaporated

출처 및 근거

ORD 기록
ord-d58713bc185f48cf969975b9d3796498
출처 데이터셋
uspto-grants-1996_11
특허 번호
US05576338

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