Copper‐Catalyzed Mild Nitration of Protected Anilines
作者:Elier Hernando、Rafael R. Castillo、Nuria Rodríguez、Ramón Gómez Arrayás、Juan C. Carretero
DOI:10.1002/chem.201404000
日期:2014.10.20
A practical copper‐catalyzed direct nitration of protected anilines, by using one equivalent of nitric acid as the nitrating agent, has been developed. This procedure features mild reaction conditions, wide structural scope (with regard to both N‐protecting group and arene substitution), and high functional‐group tolerance. Dinitration with two equivalents of nitric acid is also feasible.
investigated in an aqueoussolution containing nitrates and nitrites at 310 nm and 365 nm, respectively. In both NO3− and NO2− conditions, the degradation of monuron followed pseudo-first order kinetics. The intermediate products were identified by GC-MS, and the nitration, hydroxylation and coupling reactions were determined. In addition, the oxidation of the N-terminus group, the substitution of chlorine
Cu(II)-Catalyzed <i>Ortho</i>-C–H Nitration of Aryl Ureas By C–H Functionalization
作者:Chun-Meng Wang、Kai-Xiang Tang、Tian-Hong Gao、Lin Chen、Li-Ping Sun
DOI:10.1021/acs.joc.8b01016
日期:2018.8.3
A novel protocol for the aromatic ortho C–H nitration of aryl ureas with Fe(NO3)3·9H2O is developed. The reaction utilizes CuCl2·2H2O as catalyst and p-TSA as additive, showing good functional group tolerance and furnishing the desired products in moderate to excellent yields.