bridged aromatic azo compounds (AAzos) from aromatic amines was developed by using red copper as catalyst. Despite numerous efforts towards the catalytic synthesis of symmetric and asymmetric AAzos derivatives, most reactions present certain drawbacks inhibiting their industrial applications, such as laborious multi-step processes, harsh reaction conditions and expensive reagents. And the synthesis
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
The palladium and copper contrast: a twist to products of different chemotypes and altered mechanistic pathways
作者:Kapileswar Seth、Sudipta Raha Roy、Asim Kumar、Asit K. Chakraborti
DOI:10.1039/c6cy00415f
日期:——
Unprecedented Pd–Ag/Cu–Ag nanocluster-catalyst switch leads to a phenazine/azoarene twist for non-radical mode C–H activation vs. radical mode N–N self-coupling of anilines.
Substituted phenylazo and phenylazoxy compounds were systematically prepared and their anti-androgenic activity was measured in terms of (1) the growth-inhibiting effect on an androgen-dependent cell line, SC-3, and (2) the binding affinity of nuclear androgen receptor. Generally, azo/azoxy compounds showed cell toxicity, and the growth-inhibiting effects on SC-3 cells correlated with the toxicity. However, some compounds, including 4, 4'-dinitroazobenzene (25), 4, 4'-dimethoxyazobenzene (33), and 2, 2'-dichloroazoxybenzene (47), possessed potent anti-androgenic activity without apparent cell toxicity.
Phenyliodine(III) Diacetate (PIDA) Mediated Synthesis of Aromatic Azo Compounds through Oxidative Dehydrogenative Coupling of Anilines: Scope and Mechanism
An efficient and environmentally benign method has been developed for the synthesis of symmetrical and unsymmetrical aromatic azo compounds through phenyliodine(III) diacetate (PIDA) mediatedoxidative dehydrogenative coupling of anilines in high yields. The scope of the reaction is broad for both homo- and cross-dimerization. A plausible reaction mechanism has been proposed based on a structurally