Ethynylbenziodazolones (EBZ) as Electrophilic Alkynylation Reagents for the Highly Enantioselective Copper‐Catalyzed Oxyalkynylation of Diazo Compounds
作者:Durga Prasad Hari、Lionel Schouwey、Verity Barber、Rosario Scopelliti、Farzaneh Fadaei‐Tirani、Jerome Waser
DOI:10.1002/chem.201900950
日期:2019.7.17
radicals and nucleophiles, yet they present limited possibilities for further structure and reactivity modification. Herein, the first synthesis is reported for the corresponding ethynylbenziodazolone (EBZ) reagents, in which the oxygen atom in the iodoheterocycle is replaced by a nitrogen atom. The substituent on the nitrogen enables further fine‐tuning of the reagent structure and reactivity. EBZ reagents
乙炔基苯并恶唑(EBX)环状高价碘试剂现已确立为自由基和亲核试剂烷基化的试剂,但它们为进一步的结构和反应性修饰提供了有限的可能性。在此,报道了相应乙炔基苯并偶氮酮(EBZ)试剂的第一次合成,其中碘杂环中的氧原子被氮原子取代。氮上的取代基可进一步微调试剂的结构和反应性。EBZ试剂可通过一步步骤轻松地从相应的苯甲酰胺中获得,并具有与EBX试剂相当的反应性。特别是,它们被用于重氮化合物的不对称铜催化的氧炔基化反应中,