methodology for the synthesis of aryl/alkyl cyanamides from amines in one-pot four steps reaction using cheap, readily available and air stable copper source as catalyst under mild reaction conditions. We have also studied the application of cyanamides. In this connection, we could construct aryl tetrazolamine from cyanamides using click reaction GRAPHICAL ABSTRACT
The synthesis of arylcyanamides: a copper-catalyzed consecutive desulfurization and C–N cross-coupling strategy
作者:S. N. Murthy Boddapati、Naresh Polam、Baby Ramana Mutchu、Hari Babu Bollikolla
DOI:10.1039/c7nj03527f
日期:——
A one pot highly efficient and simple protocol for the construction of aromatic cyanamides from thioureaviadesulphurization/C–N cross coupling using a cheap, readily available and air stable copper source as a catalyst has been described.
5-aminotetrazoles has been developed by employing simple ketones as substrates. This methodology involved the N2-extrusion/aryl migration of azido complexes as the key step for the in situ generation of carbodiimidium ion, which could further react with hydrazoic acid and cyclize intramolecularly to provide 5-aminotetrazoles in good to excellent yields. In addition, the regioselectivity of the reaction was studied
Controlling Pd-Catalyzed N-Arylation and Dimroth Rearrangement in the Synthesis of <i>N</i>,1-Diaryl-1<i>H</i>-tetrazol-5-amines
作者:Andrea M. Nikolić、Jelena Stanić、Matija Zlatar、Maja Gruden、Boban And̵elković、Života Selaković、Vladimir Ajdačić、Igor M. Opsenica
DOI:10.1021/acs.joc.1c00282
日期:2021.3.19
thermodynamic stability of the compounds. It was established that the Dimroth rearrangement is thermodynamically controlled, and the equilibrium of the reaction is determined by the stability of the corresponding isomers. The mechanism was investigated by additional DFT calculations, and the opening of the tetrazole ring was shown to be the rate-determining step. By maneuvering Pd-catalyzed N-arylation and the
An eco‐friendly synthesis of 5‐aminotetrazoles using trichloroisocyanuric acid as desulfurization agent of thioureas
作者:Adriana Marques Moraes、Tiago Lima da Silva、Marcio C. S. de Mattos
DOI:10.1002/jhet.4667
日期:2023.9
novel procedure for the preparation of various 5-aminotetrazoles derivatives was achieved using trichloroisocyanuric acid as a desulfurizing agent of thioureas and trimethylsilyl azide in ethyl acetate at room temperature. This methodology provided substituted 5-aminotetrazoles through a more sustainable reaction using an affordable, safe, stable, and easily handled N-halo reagent, a safer azide source