Synthesis and characterization of new α,β-unsaturated γ-lactones: Alkyl 3-acetyl-4-hydroxy-2-methyl-5-oxo-2,5-dihydrofuran-2-ylcarbamates
作者:Ş. H. Üngören、M. Saçmaci、Y. Akçamur、C. Arici、D. Ülkü
DOI:10.1002/jhet.5570420431
日期:2005.5
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
描述了制备5-氧代-2,5-二氢呋喃(3)的氨基甲酸酯衍生物的简便方法。该方法基于三个氨基甲酸烷基酯(2)与4-乙酰基-5-甲基-2,3-二氢-2,3-呋喃二酮(1)的迈克尔型加成。根据1 H nmr光谱,化合物在CDC1 3中显示互变异构形式(3,4,5)。在固态下,合成的化合物为烯醇形式(3)。用分子光谱法表征产物。