1,2,5-Oxadiazole oxides (furoxans) are well known nitric oxide donors; among them, 4-fluorofuroxans have recently been found to be important photoinduced nitric oxide donors. In this research, it was shown that the reaction of 4,4′-dinitro-[3,3′-bi(1,2,5-oxadiazole)] 2,2′-dioxide with fluoro-containing reagents (tetrabutylammonium fluoride or cesium fluoride) selectively gave the bis-substitution product 4,4′-difluoro-[3,3′-bi(1,2,5-oxadiazole)] 2,2′-dioxide. The structure of the synthesized compound was established by elemental analysis, 13C, 19F-NMR and IR spectroscopy, and mass-spectrometry.

中文翻译：

---

4,4′-二氟-[3,3′-双(1,2,5-恶二唑)]2,2′-二氧化物

1,2,5-恶二唑氧化物（呋喃酮）是众所周知的一氧化氮供体；其中，最近发现4-氟呋喃酮是重要的光诱导一氧化氮供体。本研究表明，4,4'-二硝基-[3,3'-双(1,2,5-恶二唑)]2,2'-二氧化物与含氟试剂（四丁基氟化铵或氟化铯）选择性地得到双取代产物4,4'-二氟-[3,3'-双（1,2,5-恶二唑）]2,2'-二氧化物。通过元素分析、13C、19F-NMR、IR光谱和质谱确定了合成化合物的结构。