在本文中,提出了在有氧或无氧条件下通过Rh(III)催化的2-炔基苯胺的逐步二聚反应,空前选择性地合成吲哚[3,2- c ]喹啉或3-(2-氨基苯基)喹啉衍生物。值得注意的是,发现六氟异丙醇是这些反应成功的关键溶剂和促进剂。另外,如此获得的产物的实用性通过它们容易地转化成药学上和光物理上重要的萘啶衍生物而得以展示。
Synthesis of carbonylated heteroaromatic compounds via visible-light-driven intramolecular decarboxylative cyclization of o-alkynylated carboxylic acids
An efficient strategy for the easy access to carbonylated heteroaromatic compounds has been developed via a visible-light-promoted intramolecular decarboxylative cyclization reaction of o-alkynylated carboxylic acids. This method is characterized by its benign conditions and the tolerance to a wide range of functionalities.
Palladium-Catalyzed Ligand-Free Double Cyclization Reactions for the Synthesis of 3-(1′-Indolyl)-phthalides
作者:Shuo Yuan、Dan-Qing Zhang、Jing-Ya Zhang、Bin Yu、Hong-Min Liu
DOI:10.1021/acs.orglett.9b04241
日期:2020.2.7
heterocyclic scaffolds in numerous natural products and bioactive molecules. The synthesis and biological evaluation of the compounds combining these two scaffolds have rarely been reported. Herein, we repot the first palladium-catalyzed ligand-free double cyclization reactions that enable efficient synthesis of 3-(1'-indolyl)-phthalides (42 examples, up to 96% yield) under mild conditions. Notably
Palladium-catalyzed <i>C</i>-glycosylation and annulation of <i>o</i>-alkynylanilines with 1-iodoglycals: convenient access to 3-indolyl-<i>C</i>-glycosides
作者:Jianchao Liu、Xiao Xiao、Puren Han、Huiwen Zhou、Qi-Shuang Yin、Jian-Song Sun
DOI:10.1039/d0ob01812k
日期:——
2-glycosides through a palladium-catalyzed annulation/C-glycosylation sequence of o-alkynylanilines with 1-iodoglycals has been developed. This methodology has a wide scope of substrates and gives access to 3-indolyl-C-Δ1,2-glycosides in high yields. Furthermore, the product obtained here exhibits a high utility for further transformations.
nickel-catalyzed cyclization of N-(o-ethynylaryl)acrylamides for the selective synthesis of dihydrocyclobuta[c]quinolin-3-ones and benzo[b]azocin-2-ones. The two varied products could be easily obtained by tuning the reaction temperature. This reaction features easy temperature-control, high efficiency, and gram-scale synthesis.
我们在本文中描述了镍催化的N -( o -ethynylaryl) 丙烯酰胺环化反应,用于选择性合成二氢环丁[ c ]quinolin-3-ones 和 benzo [ b ]azocin-ones。通过调节反应温度可以很容易地获得两种不同的产物。该反应具有易控温、高效、克级合成等特点。