A Sulfonic Acid Polyvinyl Pyridinium Ionic Liquid Catalyzes the Multi-Component Synthesis of Spiro-indoline-3,5′-pyrano[2,3-<i>d</i>]-pyrimidines and -Pyrazines
A sulfonated poly-4-vinyl pyridinium (PVPy-IL-B-SO<sub>3</sub>H) containing an acidic pyridinium/HSO<sub>3</sub><sup>−</sup> ionic liquid moiety was prepared and used as a catalyst for the three-component reaction of malononitrile with 1-alkylindoline-2,3-diones a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-04-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/28/9/3663 |