In continuing the studies on the synthesis and evaluation of antifungal activity of the analogues of (-)incrustoporine, the replacement of the phenyl moiety at C3 of the furanone ring with a hetaryl substituent was considered. Thus, a series of 5-alkyl-3-hetaryl-2,5-dihydrofuran-2-ones with the thienyl, furyl and thiazolyl moieties attached to C3 was synthesized, and the compounds subjected to antifungal activity screening. In the preparation of compounds containing the oxazolyl fragment, the [2,3]-sigmatropic rearrangement led to the fragmentation of the oxazole ring, resulting in the formation of 3-(1-benzamido-2-oxoethylidene)-5-methyltetrahydrofuran-2-one. Somewhat surprisingly, the antifungal efficiency of the derivatives was lower in comparison with analogues containing a substituted phenyl at C3.
在继续对(-)incrustoporine的类似物进行合成和抗真菌活性评估的研究中,考虑了在呋喃酮环的C3位置用杂环取代基取代苯基的替换。因此,合成了一系列连接到C3的噻吩基、呋喃基和噻唑基的5-烷基-3-杂环-2,5-二氢呋喃-2-酮,并对这些化合物进行了抗真菌活性筛选。在含有噁唑基片段的化合物制备过程中,[2,3]-sigmatropic重排导致噁唑环的断裂,形成了3-(1-苯甲酰胺基-2-氧乙烯基)-5-甲基四氢呋喃-2-酮。令人惊讶的是,与含有取代苯基的类似物相比,这些衍生物的抗真菌效果较低。