Boron tribromide → 2-(2,4-Dichlorophenyl)benzoxazol-5-ol

HRID 1245365

반응식

HRID 1245365 반응식
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1[O:10][C:11]2[CH:17]=[CH:16][C:15]([O:18]C)=[CH:14][C:12]=2[N:13]=1.B(Br)(Br)Br>ClCCl>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1[O:10][C:11]2[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:12]=2[N:13]=1

참가 물질

4

반응물 2

HCID 25134Boron tribromideHCID 219116842-(2,4-Dichlorophenyl)-5-methoxybenzoxazole

생성물 1

HCID 219117282-(2,4-Dichlorophenyl)benzoxazol-5-ol

시약·촉매·용매 1

HCID 6344Dichloromethane용매2회

실험 절차

2-(2,4-dichlorophenyl)-5-methoxybenzoxazole (0.5 g, 1.7 mmol) was dissolved in 25 mL dichloromethane. To the solution was added boron tribromide (8 mmol) and the mixture was allowed to stir at room temperature for 48 hours. The mixture was then diluted with 25 mL dichloromethane and washed sequentially with saturated sodium bicarbonate (2×25 mL), followed by brine. The organic layer was separated, dried over MgSO4 and filtered. The solvent was removed under reduced pressure, to provide 2-(2,4-dichlorophenyl)benzoxazol-5-ol, which was purified using flash chromatography.

후처리

  1. washwashed sequentially with saturated sodium bicarbonate (2×25 mL)
  2. customThe organic layer was separated
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. customThe solvent was removed under reduced pressure

출처 및 근거

ORD 기록
ord-df525709af4e439e997e9f343e88b270
출처 데이터셋
uspto-grants-2006_10
특허 번호
US07125876B2

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