Bifunctional Ionic Liquids for the Multitask Fixation of Carbon Dioxide into Valuable Chemicals. Issue 1 (26th November 2015)

• Record Type: Journal Article
• Authors: Saptal, Vitthal B.; Bhanage, Bhalchandra M.
• Is Part Of: ChemCatChem. Volume 8:Issue 1(2016)
• Page Start: 244
• Page End: 250
• Publication Date: 2015-11-26
• Subjects: carbon dioxide -- cycloaddition reaction -- heterogeneous catalysis -- ionic liquids -- polymer; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201501044
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: A series of task‐specific ionic liquids (ILs) such as mono‐, dicationic, and polymer‐supported ILs were synthesized. These ILs were applied as multitasking organocatalysts for transformations of carbon dioxide into valuable chemicals through a range of reactions, including (i) cycloaddition reactions of CO2 /CS2 with epoxides to form cyclic carbonates and 1, 3‐oxathiolane‐2‐thiones, (ii) transesterification of cyclic carbonates with methanol to form dimethyl carbonate, and (iii) synthesis of quinazoline‐2, 4(1 H, 3 H )‐diones and quinazoline‐2, 4(1 H, 3 H )‐dithiones from 2‐aminobenzonitriles and CO2 /CS2 . The developed methodology is transition‐metal free, solvent free, and additive free. Remarkably, the developed ILs were recyclable in up to seven consecutive cycles; thus, making this protocol green and cost effective. Abstract : Multitasking ionic liquids : A series of task‐specific ionic liquids (ILs) are synthesized and used as multitasking organocatalysts for transformations of carbon dioxide into valuable chemicals through a range of reactions. The developed methodology is transition‐metal free, solvent free, and additive free. The developed ILs were recyclable in up to seven consecutive cycles; thus, making this protocol also green and cost effective.