Metal-free regioselective nitration of quinoxalin-2(1<i>H</i>)-ones with <i>tert</i>-butyl nitrite
作者:Yi-Na Li、Xue-Lin Li、Jin-Bo Wu、Hong Jiang、Yunmei Liu、Yu Guo、Yao-Fu Zeng、Zhen Wang
DOI:10.1039/d1ob02015c
日期:——
A metal-free coupling of quinoxalin-2(1H)-ones with tert-butylnitrite has been developed. Distinctly from the previous functionalization of quinoxalin-2(1H)-ones, this nitration reaction took place selectively at the C7 or C5 position of the phenyl ring, affording a series of 7-nitro and 5-nitro quinoxalin-2(1H)-ones in moderate to good yields. Preliminary mechanistic studies revealed that the reaction