Synthesis of Novel Pyrrole Derivatives
Author Information
Author(s): Satish S. More, Mohan T. Krishna, Kumar Y. Sateesh, Kumar U. K. Syam, Patel Navin B, Sibi Mukund P
Primary Institution: Dr. Reddy's Laboratories Ltd.
Hypothesis
Can iodide ion mediated ring expansion of N-vinylaziridines yield novel pyrrole derivatives?
Conclusion
The study successfully demonstrated the synthesis of novel 5-alkyl/aryl/heteroaryl substituted diethyl 3,4-dihydro-2H-pyrrole-4,4-dicarboxylates using iodide ion mediated aziridine ring expansion.
Supporting Evidence
- The methodology yielded pyrrole derivatives in very good to excellent yields (81–93%).
- Electron withdrawing groups on aryl rings slowed the reaction rates.
- Various novel pyrroline derivatives were synthesized as key intermediates.
Takeaway
Scientists found a new way to make special chemical compounds called pyrroles, which can be used to create other important substances.
Methodology
The synthesis involved iodide ion mediated ring expansion of N-vinylaziridines under mild conditions to produce pyrrole derivatives.
Limitations
The reaction rates were slower for aryl substitutions compared to alkyl substitutions due to steric hindrance.
Digital Object Identifier (DOI)
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