Zakeri, Masoumeh and Nasef, Mohamed Mahmoud and Abouzari-Lotf, Ebrahim Abouzari and Haghi, Hoda (2015) Ultrasound-assisted regioselective ring opening of epoxides with nitrogen heterocycles using pyrrolidonium and imidazolium-based acidic ionic liquids. Research on Chemical Intermediates, 41 (12). pp. 10108-10097. ISSN 0922-6168
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Official URL: http://dx.doi.org/10.1007/s11164-015-2015-4
Abstract
Imidazolium and N-methyl-2-pyrrolidonium ionic liquids under ultrasound irradiation were developed as a green and expeditious approach for C-alkylation and N-alkylation of the nitrogen heterocycles including indoles and imidazoles with aliphatic and aromatic epoxides. Ionic liquids were used with a dual role of catalyst and solvent. The highest yield (85 %) was obtained with N-methyl-2- pyrrolidonium dihydrogen phosphate [H-NMP]H2PO4 as a pyrrolidonium ionic liquid under ultrasound at 50 kHz, with a reaction time of 60 min and reaction temperature of 60 °C. The combination of ionic liquids and ultrasonic irradiation was found to be an effective, green and eco-friendly method for alkylation of indoles and imidazoles.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | regioselective ring opening, ultrasound irradiation |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Chemical Engineering |
| ID Code: | 55951 |
| Deposited By: | Muhamad Idham Sulong |
| Deposited On: | 27 Oct 2016 09:36 |
| Last Modified: | 25 Aug 2017 10:50 |
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