Carbene Radicals in Cobalt(II)-Porphyrin-Catalysed Carbene Carbonylation Reactions; A Catalytic Approach to Ketenes
作者:Nanda D. Paul、Andrei Chirila、Hongjian Lu、X. Peter Zhang、Bas de Bruin
DOI:10.1002/chem.201301731
日期:2013.9.23
One‐pot radicals: Cobalt(III)–carbene radicals, generated by metallo‐radical activation of diazo compounds and N‐tosylhydrazone sodium salts with cobalt(II) complexes of porphyrins, readily undergo radical addition to carbon monoxide, allowing the catalytic production of ketenes. These ketenes subsequently react with various amines, alcohols and imines in one‐pot tandem transformations to produce differently
一锅自由基:钴(III)-卡宾自由基,由重氮化合物和N-甲苯磺酰腙钠盐与卟啉的钴(II)络合物的金属自由基活化产生,容易与一氧化碳发生自由基加成,从而催化生产酮。这些乙烯酮随后与各种胺、醇和亚胺在一锅串联转化中反应,以良好的分离产率生产不同取代的酰胺、酯和 β-内酰胺。