An oxidative and acid-free method for the nitration of N-aryl sulfonamides has been developed using a combination of sodium nitrite as cheap and easy to handle NO2-source and the hypervalent iodine reagent PIFA as stoichiometric oxidant. Under very mild reaction conditions, the desired mononitrated aryl sulfonamides were isolated in up to 87% yield. This is the first example of an iodane-mediated oxidative nitration.
已开发出一种无氧化剂和酸的N-芳基磺酰胺硝化方法,该方法采用廉价的
亚硝酸钠作为易处理的
NO2来源,以及高价
碘试剂
PIFA作为定量氧化剂。在非常温和的反应条件下,所期望的单硝基芳基磺酰胺以高达87%的产率被分离出来。这是首次报道
碘烷介导的氧化硝化反应。