Rhodium(<scp>iii</scp>)-catalyzed cascade reactions of benzoic acids with dioxazolones: discovery of 2,5-substituted benzoxazinones as AIE molecules
作者:Jinbiao Li、Shuaizhong Zhang、Madhava Reddy Lonka、Jinquan Zhang、Hongbin Zou
DOI:10.1039/c9cc05178c
日期:——
A rhodium-catalyzed cascade reaction of benzoic acids with 1,4,2-dioxazol-5-ones was studied. The carboxyl group enabled a double C–H amidation followed by further intramolecular cyclization to afford 2,5-substituted benzoxazinones, which exhibited aggregation-induced emission (AIE) properties with a promising excited-state intramolecular proton-transfer (ESIPT) phenomenon.
研究了铑催化的苯甲酸与1,4,2-二恶唑-5-酮的级联反应。羧基使C–H双酰胺化,然后进行进一步的分子内环化,得到2,5-取代的苯并嗪酮,表现出聚集诱导的发射(AIE)特性,并具有令人兴奋的激发态分子内质子转移(ESIPT)现象。