Conversion of anilines into azobenzenes in acetic acid with perborate and Mo(VI): correlation of reactivities
作者:C. Karunakaran、R. Venkataramanan
DOI:10.1007/s11696-018-0599-z
日期:2019.2
azobenzenes in good yield from commercially available anilines using sodiumperborate (SPB) and catalytic amount of Na2MoO4 under mild conditions. Glacial acetic acid is the solvent of choice and the aniline to azobenzene conversion is zero, first and first orders with respect to SPB, Na2MoO4 and aniline, respectively. Based on the kinetic orders, UV–visible spectra and cyclic voltammograms, the conversion
作者:Raymond T. Gephart、Daria L. Huang、Mae Joanne B. Aguila、Graham Schmidt、Andi Shahu、Timothy H. Warren
DOI:10.1002/anie.201201921
日期:2012.6.25
A β‐diketiminato copper(I) catalyst enables CHamination of anilines employing low catalyst loadings to preclude oxidation to the diazene ArNNAr (see scheme). Electron‐poor anilines are particularly resistant towards diazene formation and participate in the amination of strong and unactivated CH bonds. N‐alkyl anilines also take part in CHamination.
Homolytic dediazoniation of tribromo- and trichloro-benzenediazonium tetrafluoroborates in highly ionizing, low-nucleophilicity solvents (trifluoroethanol and trifluoromethanesulfonic acid (TfOH)) exhibits a strong magnetic-field dependency of dediazoniation products; a more facile singlet-to-triplet intersystem crossing results in increased radical-escape products at higher magnetic fields.