Direct Synthesis of Cyclic Imides from Carboxylic Anhydrides and Amines by Nb 2 O 5  as a Water‐Tolerant Lewis Acid Catalyst | Zendy

Ali Md. A. | Zendy; Moromi Sondomoyee K. | Zendy; Touchy Abeda S. | Zendy; Shimizu Kenichi | Zendy

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Direct Synthesis of Cyclic Imides from Carboxylic Anhydrides and Amines by Nb 2 O 5 as a Water‐Tolerant Lewis Acid Catalyst

Author(s) -

Ali Md. A.,

Moromi Sondomoyee K.,

Touchy Abeda S.,

Shimizu Kenichi

Publication year - 2016

Publication title -

chemcatchem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.497

H-Index - 106

eISSN - 1867-3899

pISSN - 1867-3880

DOI - 10.1002/cctc.201501172

Subject(s) - lewis acids and bases , catalysis , aniline , chemistry , succinic anhydride , homogeneous , heterogeneous catalysis , lewis acid catalysis , organic chemistry , polymer chemistry , physics , thermodynamics

In the 20 types of heterogeneous and homogenous catalysts screened, Nb 2 O 5 showed the highest activity for the synthesis of N ‐phenylsuccinimide by dehydrative condensation of succinic anhydride and aniline. Nb 2 O 5 was used in the direct imidation of a wide range of carboxylic anhydrides with NH 3 or amines with various functional groups and could be reused. Kinetic studies showed that the Lewis acid Nb 2 O 5 catalyst was more water tolerant than both the Lewis acidic oxide TiO 2 and the homogeneous Lewis acid ZrCl 4 , which resulted in higher yields of imides through the use of Nb 2 O 5 .

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