Synthesis of Non‐Symmetric Azoarenes by Palladium‐Catalyzed Cross‐Coupling of Silicon‐Masked Diazenyl Anions and (Hetero)Aryl Halides
作者:Lucie Finck、Martin Oestreich
DOI:10.1002/anie.202210907
日期:2022.10.4
non-symmetric azobenzene derivatives by an unprecedented C(sp2)−N(sp2) cross-coupling is presented. N-Aryl-N′-silyldiazenes are employed as diazenyl anion equivalents that can be selectively coupled under palladium catalysis with a large array of (hetero)aryl bromides in high yields. The functional-group tolerance on either (hetero)aryl ring is excellent.
efficient method for synthesis of both symmetric and asymmetric aromaticazocompounds in one single step has been developed. The nitrocompounds were reduced and the substituted anilines were oxidized by each other without any metal in the base condition. Various azocompounds with halogen, methyl and methoxy functional group were obtained by using available, cheap nitrocompounds and substituted anilines