17049-55-7Relevant academic research and scientific papers
Palladium-Catalyzed Carbonylative Cyclization of Azoarenes
Wang, Zechao,Yin, Zhiping,Zhu, Fengxiang,Li, Yahui,Wu, Xiao-Feng
, p. 3637 - 3640 (2017/10/13)
In this communication, we established an interesting palladium-catalyzed carbonylation protocol for the intramolecular cyclization of azoarenes. With Mo(CO)6 as the solid CO source and through C(sp2)?H bond activation, a series of azoarenes were transformed into the corresponding 2-arylindazolones in moderate to good yields. Notably, not only symmetrical azoarenes, but also unsymmetrical substrates underwent the reaction with excellent regioselectivity.
Carbonylation of nitro and azo compounds in the presence of iron carbonyl catalysts
Lapidus,Pelrovskii,Manov-Yuvenskii,Zelinsky
, p. 2331 - 2334 (2007/10/03)
The reactions of nitro and azo compounds with carbon monoxide were studied in the presence of iron carbonyl catalysts. It was shown that these catalytic systems differ substantially from Pd- and Rh-containing catalysts. In the case of the iron catalysts, the products of coupling of molecules are formed as intermediates and azo compounds are the final reaction products. The reactions involving the palladium and rhodium catalysts proceed without the intermediate formation of the coupling products and lead to isocyanates or carbamates. When combined using PdCh and Fe(CO)5/Al2Oj, the catalysts inhibit each other, especially in the presence of pyridine.
