photoinduced aerobic tandem dehydrogenative Povarov cyclisation/Csp3–H oxygenation reactions between N-aryl glycine esters and α-substituted styrenes, which efficiently lead to 4,4-disubstituted dihydroquinoline-3-ones under mild conditions. The reactions are mediated by iodine along with visible light irradiation, which allows for the in situ generation of the essential Brønstedacid HI, to catalyse
The unprecedented title reaction between glycinederivatives and indoles, as well as the auto‐oxidative Povarov/aromatization tandem reaction of glycinederivatives with olefins are described. The reactions were performed in the absence of redox‐active catalysts and chemical oxidants under mild reaction conditions. Only simple organic solvents and air (or O2) were required.
Construction of quinoline-fused lactones and 2,3-disubstituted quinolines via catalytic aerobic sp3 C–H oxidation: application of fragment-reassembly strategy
by fragment-reassembly strategy, the reaction between glycine esters and cyclic enol ethers was achieved in the catalysis of TBPA+·/O2, yielding a series of quinoline-fused lactones and 2,3-disubstituted quinolines. This approach provided an efficient method to construct quinoline skeleton, in which two new rings and two new C–C bonds were built in one pot.
通过片段重组策略设计,在TBPA +· / O 2的催化作用中实现了甘氨酸酯与环状烯醇醚之间的反应,生成了一系列喹啉稠合的内酯和2,3-二取代喹啉。这种方法提供了一种构造喹啉骨架的有效方法,其中在一个罐中建立了两个新的环和两个新的C-C键。
Metal-free photocatalyzed aerobic oxidative C<sub>sp3</sub>–H functionalization of glycine derivatives: one-step generation of quinoline-fused lactones
作者:Youxiang He、Baorun Yan、Hua Tao、Yuan Zhang、Ying Li
DOI:10.1039/c8ob00240a
日期:——
This reaction provides facile access to a series of valuable quinoline-fused lactones at room temperature under an air atmosphere.
这种反应在室温下,在空气氛围下提供了一系列有价值的喹啉融合内酯的便捷合成方法。
Iron Catalyzed Dual-Oxidative Dehydrogenative (DOD) Tandem Annulation of Glycine Derivatives with Tetrahydrofurans
作者:Congde Huo、Fengjuan Chen、Yong Yuan、Haisheng Xie、Yajun Wang
DOI:10.1021/acs.orglett.5b02504
日期:2015.10.16
A novel iron-catalyzed dual-oxidative dehydrogenative (DOD) tandem annulation of glycine derivatives with tetrahydrofurans (THFs) for the synthesis of high value quinoline fused lactones has been developed. The reactions were performed under mild reaction conditions. And the use of cheap substrates (glycine derivatives and THF) and an even cheaper simple inorganic iron salt as the catalyst makes this protocol very attractive for potential synthetic applications.