Copper-Catalyzed Oxidative [4 + 2]-Cyclization Reaction of Glycine Esters with Anthranils: Access to 3,4-Dihydroquinazolines
作者:Jie Ren、Chao Pi、Yangjie Wu、Xiuling Cui
DOI:10.1021/acs.orglett.9b01246
日期:2019.6.7
synthesis of 3,4-dihydroquinazolines has been developed via copper-catalyzed oxidative cross-dehydrogenative [4 + 2]-cyclization of glycine derivatives with anthranils. This strategy features high efficiency and wide substrate tolerance under simple reaction conditions. Various 3,4-dihydroquinazoline derivatives could be easily obtained starting from titled products through chemical transformations, which
A metal-free, photoinduced aerobic tandem amine dehydrogenation/Povarov cyclization/aromatizationreaction between N-aryl glycine esters and indoles leads to tetracyclic 11H-indolo[3,2-c]quinolines under mild conditions and with high yields. The reaction can be performed by using molecular iodine along with visible light, or by combining an organic photoredox catalyst with a halide anion. Mechanistic
A Catalytic Approach to Quinoline Fused Lactones and Lactams from Glycine Derivatives
作者:Congde Huo、Yong Yuan、Fengjuan Chen、Yajun Wang
DOI:10.1002/adsc.201500513
日期:2015.11.16
A dual catalyst system [copper(II) chloride-sulfuric acid, (CuCl2-H2SO4)]-promoted aerobic oxidative reaction of glycine derivatives with 2,3-dihydrofurans or 2,3-dihydropyrroles has been explored, affording an efficient synthesis of high value quinoline fused lactones and lactams. The application of this new methodology to the synthesis of a bioactive C ring extension analogue of luotonin A has been
探索了一种双催化剂体系[氯化铜(II)硫酸,(CuCl 2 -H 2 SO 4)]-促进甘氨酸衍生物与2,3-二氢呋喃或2,3-二氢吡咯的好氧氧化反应,得到了有效合成高价值的喹啉融合内酯和内酰胺。以简洁的三步顺序完成了这种新方法在合成荧光素A的生物活性C环延伸类似物方面的应用。
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。