A12 超音波照射下,KBr(NH_4)_6Mo_7O_<24>によるフェノールの臭素化

• 藤田 光恵

  滋賀医大化

• Bosson Alexis

  滋賀医大化

• Leveque Jean-Marc

  滋賀医大化

• 宗宮 創

  滋賀医大化

• 木村 隆英

  滋賀医大化

書誌事項

タイトル別名

• A12 Mono-bromination of phenol by KBr/H_2O_2/(NH_4)_6Mo_7O_<24> under sonication

抄録

A two-phase (H_2O/CHCl_3) procedure for the mono-bromination of phenol with KBr and H_2O_2 catalyzed by molybdenum was carried out under sonication. This reaction does not take place under our silent conditions. The irradiation of 20 kHz ultrasound gave 93% yield of o-and p-bromophenols in 4 h. With neither catalyst nor H_2O_2 it gave only 23% yields. Increasing the ratio of H_2O/CHCl_3 did not change the result. This suggests the possibility to make the use of organic solvent decrease. Although 480 kHz compared to 20 kHz gave the lower yield, 68%, the ratio of o-/p-bromophenol did not changed. This suggests the reaction mechanism is the same and the role of ultrasound may be mainly an efficient mixing.

収録刊行物

• ソノケミストリー討論会講演論文集

  ソノケミストリー討論会講演論文集 18 (0), 87-88, 2009

  日本ソノケミストリー学会

キーワード

• bromination
• phenol
• hydrogen peroxide
• molybdenum

詳細情報

• CRID: 1390001206052117632
• NII論文ID: 110009710495
• DOI: 10.20577/pamjss.18.0_87
• ISSN: 24241512
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可