Synthesis and characterization of new α,β‐unsaturated γ‐lactones: Alkyl 3‐acetyl‐4‐hydroxy‐2‐methyl‐5‐oxo‐2,5‐dihydrofuran‐2‐ylcarbamates |
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Authors: | H Üngren M Samaci Y Akamur C Arici D Ülkü |
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Abstract: | A convenient procedure for the preparation of carbamate derivatives of 5‐oxo‐2,5‐dihydrofuran ( 3 ) was described. The method is based on the Michael type addition of three alkyl carbamates ( 2 ) with 4‐acetyl‐5‐methyl‐2,3‐dihydro‐2,3‐furandione ( 1 ). According to 1H nmr spectra of compounds show tautomeric forms ( 3,4,5 ) in CDC13. In the solid state the synthesized compounds are enol forms ( 3 ). The products were characterized with molecular spectroscopic methods. |
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