Boron tribromide → HCID 67036758、化合物

HRID 1920074ノート

反応式

HRID 1920074 の反応式
C[O:2][C:3]1[CH:4]=[C:5]([C:14]2[N:15]=[C:16]([C:19]3[C:20]([C:26]([F:29])([F:28])[F:27])=[N+:21]([O-:25])[CH:22]=[CH:23][CH:24]=3)[O:17][CH:18]=2)[CH:6]=[C:7]([N+:11]([O-:13])=[O:12])[C:8]=1[O:9]C.B(Br)(Br)Br>ClCCl>[OH:2][C:3]1[CH:4]=[C:5]([C:14]2[N:15]=[C:16]([C:19]3[C:20]([C:26]([F:27])([F:29])[F:28])=[N+:21]([O-:25])[CH:22]=[CH:23][CH:24]=3)[O:17][CH:18]=2)[CH:6]=[C:7]([N+:11]([O-:13])=[O:12])[C:8]=1[OH:9]

参加物

4

反応物 2

HCID 25134Boron tribromideHCID 67036906HCID 67036906、化合物

生成物 1

HCID 67036758HCID 67036758、化合物

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

反応条件

温度
-78 °C

実験手順

3-(4-(3,4-Dimethoxy-5-nitrophenyl)oxazol-2-yl)-2-(trifluoromethyl)pyridine 1-oxide (1.23 g, 3 mmol) was taken up in dichloromethane (25 mL). The yellowish suspension was cooled to −78° C. under argon and boron tribromide (2.55 mL, 27 mmol) was added dropwise. The red reaction mixture was allowed to warm to room temperature and stirred for 18 hours. It was then carefully poured into ice-water (100 mL) and stirred for 1 hour. The resulting yellow precipitate was filtered off, washed with water and dried over P2O5 under vacuum. The solid was recrystallized from ethanol to give 3-(4-(3,4-dihydroxy-5-nitrophenyl)oxazol-2-yl)-2-(trifluoromethyl)pyridine 1-oxide as a yellow solid, 0.65 g, (57%).

後処理

  1. customThe red reaction mixture
  2. temperatureto warm to room temperature
  3. stirringstirred for 1 hour
  4. filtrationThe resulting yellow precipitate was filtered off
  5. washwashed with water
  6. dry with materialdried over P2O5 under vacuum
  7. customThe solid was recrystallized from ethanol

出典と根拠

ORDレコード
ord-3104cb3f41944eaa84fdcd35838caaf8
出典データセット
uspto-grants-2012_05
特許番号
US08168793B2

反応ノート

読み込み中…