Under the reaction conditions of Pd(PPh3)4 (2.5 mol %) and PPh3 (10 mol %) in EtOAc at 60 °C, the formal (5 + 6) cycloaddition of vinylethylene carbonates with isatoic anhydrides proceeded smoothly and furnished medium-sized N,O-containing heterocycles in reasonable chemical yields. The chemical structures of the title products were clearly identified by X-ray diffraction analysis.
在60°C下,Pd(PPh 3)4(2.5 mol%)和PPh 3(10 mol%)在EtOAc中的反应条件下,
碳酸乙烯基亚
乙酯与等角酸酐的正式(5 + 6)环加成反应顺利进行,并提供了介质大小的N,O含杂环,
化学收率合理。通过X射线衍射分析清楚地鉴定出标题产物的
化学结构。