Ren, Yun-lai; Wang, Qian; Tian, Xin-zhe; Wang, Bin-yu; Wang, Pei published the artcile< Nitrogen dioxide-catalyzed oxidative bromination of benzenes and naphthalines with electron-donating substituents at room temperature>, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole, the main research area is aryl bromide preparation oxidative bromination arene nitrogen dioxide catalyst.
Oxidative bromination of benzenes and naphthalines with electron-donating substituents was investigated by using 8.2% nitrogen dioxide as the catalyst, the residual oxygen in the reaction tube as the oxidant, and mol. bromine as the brominating reagent at room temperature The used heavy metal waste-free catalyst can be easily removed from the products and scarcely stains the final products. But a small amount of byproduct from the nitration of the benzene ring was observed, which led to the consumption of nitrogen dioxide. The reaction is highly atom economic, and a majority of bromine atoms in bromine source were transferred to the bromination products. The bromination was controllable: mono- and di-bromination products were controllably obtained by changing the loading amount of the brominating reagent. Preliminary mechanistic investigation suggests that the bromination firstly undergoes the reaction between mol. bromine and aromatic ring to give aryl bromide and HBr, which is followed by oxygenation of the resulting bromine hydride to form the reactive bromine under the catalysis of the catalytic species.
Fenzi Cuihua published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole.
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem