Synthesis of 4-(pentafluorosulfanyl)benzenediazonium tetrafluoroborate and analogs and their application for the preparation of SF5-aromatics
申请人:Laali Kenneth K.
公开号:US09238660B1
公开(公告)日:2016-01-19
4-(pentafluorosulfanyl)benzenediazonium tetrafluoroborate salt was synthesized and isolated. The pentafluorosulfanyl salt was examined in a wide assortment of reactions to form novel SF5-bearing alkenes, alkynes, and biaryl derivatives using Heck-Matsuda, Sonogashira, and Suzuki coupling protocols. Dediazoniation of the salt furnished the corresponding p-SF5—C6H4X,C6H4OS(O)(CF3)═NSO2CF3, and p-SF5—C6H4-NTf2 derivatives. The azide derivative p-SF5—C6H4N3 entered into click chemistry with phenylacetylenes to furnish the corresponding triazoles. Various SF5-bearing alkenes were synthesized by coupling reactions using a metal catalyst. Fluorodediazoniation selectively furnished the fluoro derivative p-SF5—C6H4F. Homolytic dediazoniation gave the unsymmetrical biaryls, thus demonstrating the broad utility of pentafluorosulfanyl diazonium salts as building blocks of SF5-aromatics that are in high demand in many branches of chemistry including biomedicine and materials chemistry.
4-(五氟硫基)苯重氮四氟硼酸盐被合成并分离。对五氟硫基盐进行了广泛的反应研究,形成了新颖的含SF5基团的烯烃、炔烃和联苯衍生物,使用了Heck-Matsuda、Sonogashira和Suzuki偶联协议。盐的去重氮化产生了相应的p-SF5—C6H4X、C6H4OS(O)(CF3)═NSO2CF3和p-SF5—C6H4-NTf2衍生物。叠氮衍生物p-SF5—C6H4N3与苯基乙炔进行了点击化学反应,生成了相应的三唑衍生物。通过金属催化剂的偶联反应合成了各种含SF5基团的烯烃。氟去重氮化选择性地生成了氟衍生物p-SF5—C6H4F。自由基去重氮化产生了非对称联苯,从而展示了五氟硫基重氮盐作为SF5芳香化合物的构建模块在许多化学领域中的广泛用途,包括生物医药和材料化学。