Photo-induced tandem cyclization of 3-iodoflavones with electron rich five-membered heteroarenes
作者:Qian Yang、Rui Wang、Jie Han、Chenchen Li、Tao Wang、Yong Liang、Zunting Zhang
DOI:10.1039/c7ra07793a
日期:——
Vinyl radicals were generated from 3-iodoflavones under a mercury lamp and tandem cyclization reactions occurred with five-membered heteroarenes entailing two consecutive C–C bond formations to synthesize benzo[e]chromeno[2,3-g]indol-13(1H)-one derivatives. The tandem cyclization reactions worked in acetonitrile without any additives such as transition metals, ligands and oxidants, giving rise to a
在汞灯下由3-碘黄酮生成乙烯基自由基,并且与五元杂芳烃发生串联环化反应,需要两个连续的CC键形成,以合成苯并[ e ] chromeno [2,3 - g ]吲哚-13(1 H))-一阶导数。串联环化反应在乙腈中进行,没有任何添加剂,例如过渡金属,配体和氧化剂,在温和且环境友好的反应条件下,以高收率产生了各种各样的新型多环x吨酮骨架。