Bromine → 2,4-Bis(acetoxymethyl)bromobenzene

HRID 2303991ノート

反応式

HRID 2303991 の反応式
[C:1]([O:4][CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[C:8]([CH2:12][O:13][C:14](=[O:16])[CH3:15])[CH:7]=1)(=[O:3])[CH3:2].C([O-])(=O)C.[Na+].[Br:22]Br.S([O-])([O-])=O.[Na+].[Na+]>C(O)(=O)C>[C:1]([O:4][CH2:5][C:6]1[CH:7]=[C:8]([CH2:12][O:13][C:14](=[O:16])[CH3:15])[CH:9]=[CH:10][C:11]=1[Br:22])(=[O:3])[CH3:2]

参加物

6

反応物 4

HCID 24408BromineHCID 24437Sodium SulfiteHCID 517045Sodium AcetateHCID 12571717m-Xylylene glycol diacetate

生成物 1

HCID 99482912,4-Bis(acetoxymethyl)bromobenzene収率 97.7%

試薬・触媒・溶媒 1

HCID 176Acetic Acid溶媒

反応条件

温度
25 °C

実験手順

To a suspension of m-xylylene glycol diacetate (28.4 g) and sodium acetate (55.2 g) dispersed in glacial acetic acid (130 ml) was added dropwise bromine (102.5 g) over 30 min at 15-20° C., and the mixture was stirred at 20-30° C for 13 hr. The reaction mixture was poured into 10% aqueous sodium sulfite solution (700 ml) in an ice bath. The mixture was stirred and extracted twice with ethyl acetate (250 ml). The ethyl acetate layer was washed 3 times with 10% aqueous sodium hydrogencarbonate solution (300 ml) and the solvent was evaporated to give an about 93:7 mixture (37.6 g, 97.6%) of 2,4-bis(acetoxymethyl)bromobenzene and 2,6-bis(acetoxymethyl)bromobenzene as a yellow oil. 2,4-bis(Acetoxymethyl)bromobenzene was isolated by preparative HPLC and used in the measurement.

後処理

  1. stirringThe mixture was stirred
  2. extractionextracted twice with ethyl acetate (250 ml)
  3. washThe ethyl acetate layer was washed 3 times with 10% aqueous sodium hydrogencarbonate solution (300 ml)
  4. customthe solvent was evaporated

出典と根拠

ORDレコード
ord-97908cfe1cca42a6a9e021ad83b22197
出典データセット
uspto-grants-2002_08
特許番号
US06433195B1

反応ノート

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