Aerobic oxidation of deoxybenzoins could be efficiently catalyzed by 1,4-diazabicyclo[2.2.2]octane (DABCO) with air as the sole oxidant to give the corresponding benzils in excellent yields. The effects of reaction conditions, such as different bases, temperature, time and solvent, on the yield of the product were investigated. Moreover, the process has been successfully extended to a one-pot synthesis of quinoxalines from benzyl ketones and aromatic 1,2-diamines.
AgNO<sub>2</sub>-mediated direct nitration of the quinoxaline tertiary benzylic C–H bond and direct conversion of 2-methyl quinoxalines into related nitriles
作者:Degui Wu、Jian Zhang、Jianhai Cui、Wei Zhang、Yunkui Liu
DOI:10.1039/c4cc01327a
日期:——
A unique method for AgNO2-mediated direct nitration of the quinoxaline tertiary C–H bond and direct conversion of 2-methyl quinoxalines into 2-quinoxaline nitriles under oxidative conditions has been developed.