Application of chloroaluminate ionic liquid as catalyst and medium for the dealkylation of esters

作者：Wei Ben Mei^*; Zhang Zhi Yong; Dai Zhi Qun; Zhang Kai Cheng

来源：Monatshefte fur Chemie, 2011, 142(10): 1029-1033.

DOI：10.1007/s00706-011-0560-0

• Dealkylation
• Chloroaluminate ionic liquids
• Esters
• Carboxylic acids
• Catalysis
• Nucleophilic substitutions

Dealkylation of esters to carboxylic acids was performed using chloroaluminate ionic liquids (PyHBr/AlCl(3), PyHCl/AlCl(3), Me(3)NHCl/AlCl(3), Et(3)NHCl/AlCl(3)) as catalyst and medium. The catalytic activity of PyHBr/AlCl(3) (X(AlCl(3)) = 0.67) proved to be superior to the other three ionic liquids for the dealkylation of methyl benzoate with a conversion of 97% after 3 h at 140 degrees C. After easy separation from the products the ionic liquid PyHBr/AlCl(3) could be reused six times without loss of its activity.

• 出版日期2011-10
• 单位武汉轻工大学