Highly efficient synthesis of dicoumarols and xanthene derivatives in presence of Brønsted–Lewis acidic ionic liquids catalyst
作者: Faezeh AbbasiNajmedin AziziMasumeh Abdoli-Senejani
作者单位: 1Islamic Azad University-Arak Branch
2Chemistry and Chemical Engineering Research Center of Iran
刊名: Journal of the Iranian Chemical Society, 2017, Vol.14 (10), pp.2097-2103
来源数据库: Springer Nature Journal
DOI: 10.1007/s13738-017-1146-5
关键词: Brønsted–Lewis acidic ionic liquidsDicoumarols4-Hydroxycoumarin
原始语种摘要: A series of metal chloride-based acidic ionic liquids have been prepared and used as an efficient catalyst in one-pot multicomponent synthesis of biscoumarins and substituted xanthenes derivatives under solvent-free conditions. Among the acidic ionic liquids, N -methylpyrrolidonium zinc chloride (Hnmp/ZnCl3)-based Brønsted–Lewis acidic ionic liquids were found to be an effective and recyclable catalyst for a one-pot synthesis of biscoumarins through the domino Knoevenagel–Michael reaction of a variety of aldehydes with 4-hydroxycoumarin in short reaction times. The reactions which occur under relatively mild conditions afforded the biscoumarin derivatives employing a very low loading of catalyst in satisfactory isolated yields and high purity after simple work-up. The...
全文获取路径: Springer Nature  (合作)
影响因子:1.467 (2012)

  • catalyst 催化剂
  • acidic 含大量硅酸的
  • liquids 液体
  • ionic 离子的
  • derivatives 派生物
  • xanthene 口山烃
  • chloride 氯化物
  • synthesis 合成
  • presence 存在
  • aldehydes