Selective esterification of phthalic acids in two ionic liquids at high temperatures using a thermostable lipase of Bacillus thermocatenulatus: A comparative study

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• 作者：Jesú ; s Ramos Martí ; n ; Meritxel Nus ; Jose Vicente Sinisterra Gago ; José ; Mª ; Sá ; nchez-Montero
• 关键词：Ionic liquids ; Bacillus thermocatenulatus lipase ; Water activity ; Selectivity
• 刊名：Journal of Molecular Catalysis B: Enzymatic
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：52-53
• 期：Complete
• 页码：162-167
• 全文大小：276 K

文摘

The aims of the present paper were to obtain the best conditions for improving the selectivity of the esterification and amidation reactions catalysed by Bacillus thermocatenulatus lipase (BTL) at 90 and 120 °C in two ionic liquids (IL), 1-butyl-3-methyl imidazolium tetrafluoroborate (Bmim BF₄) and 1-butyl-3-methyl imidazolium hexafluorophosphate (Bmim PF₆), changing: (i) substrates (isomeric phthalic acids and 4-aminobenzoic acid), (ii) nucleophiles (alcohols) and (iii) water activity.