Pd-Catalyzed Selective Carbonylative and Non-carbonylative Couplings of Propiolic Acid: One-Pot Synthesis of Diarylalkynones
作者:Wonyoung Kim、Kyungho Park、Ahbyeol Park、Juseok Choe、Sunwoo Lee
DOI:10.1021/ol4004349
日期:2013.4.5
Diarylalkynones were synthesized from one-potPd-catalyzedcarbonylative and noncarbonylative coupling reactions of propiolicacid with aryl iodides under a carbon monoxide atmosphere. Aryl iodide (2.0 equiv), propiolicacid (1.0 equiv), Pd(PPh3)2Cl2 (5 mol %), CuCl (10 mol %), Et3N (6.0 equiv), and CO (8 atm) were reacted under optimized conditions in CH3CN at 80 °C for 1 h. This process afforded
Transition Metal‐Free Synthesis of Substituted Isothiazoles
<i>via</i>
Three‐Component Annulation of Alkynones, Xanthate and NH
<sub>4</sub>
I
作者:Jian Li、Jiaming Li、Xiaoliang Ji、Qiang Liu、Lu Chen、Yubing Huang、Yibiao Li
DOI:10.1002/adsc.202001179
日期:2021.2.16
A protocol was described to access diverse isothiazoles with functionalization potential via transition metal‐free three‐component annulation of alkynones, potassium ethylxanthate (EtOCS2K) and ammonium iodide (NH4I). A sequential regioselective hydroamination/thiocarbonylation/intramolecular cyclizationcascade achieved the efficient formation of consecutive C−N, C−S and N−S bonds in a one‐pot process
Zinc-catalyzed C–H alkenylation of quinoline <i>N</i>-oxides with ynones: a new strategy towards quinoline-enol scaffolds
作者:Yan Hu、Jiang Nan、Xue Gong、Jiawen Zhang、Jiacheng Yin、Yangmin Ma
DOI:10.1039/d1cc00245g
日期:——
A zinc-catalyzed C–H alkenylation of quinoline N-oxides with ynones has been developed to rapidly assemble a broad collection of valuable quinoline-enol organic architectures.
一种锌催化的C-H烯基化反应已经开发出来,用于快速组装一系列有价值的喹啉-烯醇有机结构。
Cu<sup>II</sup>-Catalyzed Coupling with Two Ynone Units by Selective Triple and Sigma C–C and C–H Bond Cleavages
We report a new copper-catalyzed [2 + 2 + 1] annulation process through the selective cleavage of sigma and triple C–C and C–Hbonds using two ynone units. This new methodology involves breaking multiple chemical bonds in a single operation, including C≡C, C–C, C–H, and N–O. These high-value adducts lead to a diverse collection of synthetically challenging trisubstituted indolizines by the simultaneous