2,3-Dichloro-5,6-dicyano-1,4-benzoquinone → 2-(2,4-Dichlorophenyl)-5-methoxybenzoxazole

HRID 22724

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HRID 22724 반응식
[NH2:1][C:2]1[CH:7]=[C:6]([O:8][CH3:9])[CH:5]=[CH:4][C:3]=1[OH:10].[Cl:11][C:12]1[CH:19]=[C:18]([Cl:20])[CH:17]=[CH:16][C:13]=1[CH:14]=O.C(C1C(=O)C(Cl)=C(Cl)C(=O)C=1C#N)#N>CO.ClCCl>[Cl:11][C:12]1[CH:19]=[C:18]([Cl:20])[CH:17]=[CH:16][C:13]=1[C:14]1[O:10][C:3]2[CH:4]=[CH:5][C:6]([O:8][CH3:9])=[CH:7][C:2]=2[N:1]=1

참가 물질

6

반응물 3

HCID 67752,3-Dichloro-5,6-dicyano-1,4-benzoquinoneHCID 134042,4-DichlorobenzaldehydeHCID 14191082-Amino-4-methoxyphenol2회

생성물 1

HCID 219116842-(2,4-Dichlorophenyl)-5-methoxybenzoxazole

시약·촉매·용매 2

HCID 887Methanol용매HCID 6344Dichloromethane용매

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온도
45 °C

실험 절차

To a solution of 2-amino-4-methoxyphenol (1 g, 7.1 mmol), a compound of formula (d) in 20 mL MeOH was added 2,4-dichlorobenzaldehyde (1.2 g, 7.1 mmol), a compound of formula (e). The mixture was heated at 45° C. for 12 hours. The mixture was concentrated under reduced pressure and the residue was dissolved in 50 mL dichloromethane. To the solution was added DDQ (1.7 g, 7.8 mmol), and the mixture was allowed to stir at room temperature for 30 minutes. The reaction mixture was then diluted with an additional 30 mL of dichloromethane and washed sequentially with saturated NaHCO3 (2×50 mL) and brine. The organic layer was separated, dried over MgSO4 and concentrated under reduced pressure to yield 2-(2,4-dichlorophenyl)-5-methoxybenzoxazole, a compound of formula (f), which was purified using flash column chromatography.

후처리

  1. concentrationThe mixture was concentrated under reduced pressure
  2. dissolutionthe residue was dissolved in 50 mL dichloromethane
  3. washwashed sequentially with saturated NaHCO3 (2×50 mL) and brine
  4. customThe organic layer was separated
  5. dry with materialdried over MgSO4
  6. concentrationconcentrated under reduced pressure

출처 및 근거

ORD 기록
ord-b49a608ab03748af805287bb5e78d29f
출처 데이터셋
uspto-grants-2005_02
특허 번호
US06849632B2

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