Synthesis, Characterization, and Reactivity of a Hypervalent‐Iodine‐Based Nitrooxylating Reagent
作者:Roxan Calvo、Antoine Le Tellier、Thomas Nauser、David Rombach、Darryl Nater、Dmitry Katayev
DOI:10.1002/anie.202005720
日期:2020.9.21
synthesis and characterization of a hypervalent‐iodine‐based reagent that enables a direct and selective nitrooxylation of enolizable C−H bonds to access a broad array of organic nitrate esters is reported. This compound is bench stable, easy‐to‐handle, and delivers the nitrooxy (‐ONO2) group under mild reaction conditions. Activation of the reagent by Brønsted and Lewis acids was demonstrated in the synthesis
本文报道了一种基于高价碘的试剂的合成和表征,该试剂能够使可烯醇化的CH键进行直接和选择性的硝基氧化,从而获得广泛的有机硝酸酯。该化合物在工作台上稳定,易于处理,并能释放出硝基氧基(-ONO 2)组在温和的反应条件下。在硝基氧化的β-酮酸酯,1,3-二酮和丙二酸酯的合成中证明了Brønsted和Lewis酸对试剂的激活,而在硝基氧化的吲哚的合成中则显示了其在光氧化还原催化下的活性。详细的机理研究包括脉冲辐解,斯特恩-沃尔默淬灭研究和UV / Vis光谱电化学,揭示了一种独特的单电子转移(SET)诱导的协同机理,与硝酸根自由基的产生无关。