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A Protic Ionic Liquid Catalyzes CO 2 Conversion at Atmospheric Pressure and Room Temperature: Synthesis of Quinazoline‐2,4(1 H ,3 H )‐diones
Author(s) -
Zhao Yanfei,
Yu Bo,
Yang Zhenzhen,
Zhang Hongye,
Hao Leiduan,
Gao Xiang,
Liu Zhimin
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201400521
Subject(s) - superbase , ionic liquid , chemistry , atmospheric pressure , catalysis , bifunctional , green chemistry , substrate (aquarium) , inorganic chemistry , organic chemistry , medicinal chemistry , oceanography , geology
The chemical fixation of CO 2 under mild reaction conditions is of significance from a sustainable chemistry viewpoint. Herein a CO 2 ‐reactive protic ionic liquid (PIL), [HDBU + ][TFE − ], was designed by neutralization of the superbase 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) with a weak proton donor trifluoroethanol (TFE). As a bifunctional catalyst for simultaneously activating CO 2 and the substrate, this PIL displayed excellent performance in catalyzing the reactions of CO 2 with 2‐aminobenzonitriles at atmospheric pressure and room temperature, thus producing a series of quinazoline‐2,4(1 H ,3 H )‐diones in excellent yields.