2,3‐Dichloro‐5,6‐Dicyano‐1,4‐Benzoquinone (DDQ)‐Mediated Tandem Oxidative Coupling/Intramolecular Annulation/Dehydro‐Aromatization for the Synthesis of Polysubstituted and Fused Pyridines
作者:Dongping Cheng、Zhiteng Deng、Xianhang Yan、Mingliang Wang、Xiaoliang Xu、Jizhong Yan
DOI:10.1002/adsc.201900956
日期:2019.11.5
A DDQ‐mediated tandem reaction of 1,3‐diarylpropenes and β‐enaminoesters/4‐aminocoumarins is disclosed. It involves oxidative coupling, intramolecular annulation and dehydro‐aromatization reaction, which provides an efficient and mild method for the synthesis of polysubstituted and fused pyridines under metal‐free conditions.
Synthesis of Thiazoles and Isothiazoles via Three-Component Reaction of Enaminoesters, Sulfur, and Bromodifluoroacetamides/Esters
作者:Xingxing Ma、Xiaoxia Yu、Hua Huang、Yao Zhou、Qiuling Song
DOI:10.1021/acs.orglett.0c01275
日期:2020.7.17
three-component strategy for the synthesis of thiazoles and isothiazoles has been developed by employing enaminoesters, fluorodibromoiamides/ester, and sulfur. The thiazoles and isothiazoles were formed via two C–F bond cleavages along with the formation of new C–S, C–N, and N–S bonds. The strategy provides high selectivity for the synthesis of thiazoles/isothiazoles, which have vital applications in
Copper-Catalyzed Tandem Reaction of Enamino Esters with <i>ortho</i>
-Halogenated Aromatic Carbonyls: One-Pot Approach to Functionalized Quinolines
作者:Fei Peng、Jin Liu、Lili Li、Zhiwei Chen
DOI:10.1002/ejoc.201701472
日期:2018.2.7
tandem reaction was developed for the efficientsynthesis of functionalized quinolones. The C–Cbondformation and C–N coupling reaction of enamino esters and ortho‐halogenated aromatic carbonyl compounds gave products in moderate to good yields. A successful gram‐scale protocol and synthesis of a thieno[3,2‐b]pyridine derivative show further applications of this approach.
为了有效合成功能化喹诺酮,开发了铜催化串联反应。烯氨基酯与邻卤代芳族羰基化合物的C–C键形成和C–N偶联反应使产物收率适中至良好。成功的克级规程和噻吩并[3,2- b ]吡啶衍生物的合成表明了该方法的进一步应用。
versatile method for the synthesis of alicyclic fused pyrimidones from aminoacrylates and lactams in the presence of phosphorous oxychloride is described. The results suggest that this method is widely applicable except for cyclobutyl fused systems. This method gives better yield than the method of condensing aminopyrrolidines with the beta keto esters. Synthesis and characterization of twenty five 2-aryl-1
Uracil derivatives and pesticides containing the same as active
申请人:Nissan Chemical Industries Ltd.
公开号:US05116404A1
公开(公告)日:1992-05-26
The present invention provides novel uracil derivatives and pesticides which contain the novel uracil derivatives as an active ingredient, and exhibit preventing and controlling effects against harmful living things, especially agricultural insect pests, sanitary insect pests, stored product insect pests, house insect pests and veterinary insect pests at a very low drug-concentration.