Copper-Catalyzed Carbonyl Group Controlled Coupling of Isatin Oximes with Arylboronic Acids To Prepare <i>N</i>
-Aryloxindole Nitrones
作者:Xue-Ling Mo、Chun-Hua Chen、Cui Liang、Dong-Liang Mo
DOI:10.1002/ejoc.201701324
日期:2018.1.17
prepared in good to excellent yields by copper-catalyzed coupling of N-unprotected isatin oximes with aryl boronic acids under mild reaction conditions. The reaction was tolerant various arylboronicacids with diverse sensitive functionalgroups. Detailed studies showed that the carbonyl group in isatin oximes might be served as a carbonyl ligand or a controlled group playing important roles in the formation
8-OCH3 ciprofloxacin methylene and ethylene isatin derivatives with remarkable improvement in lipophilicity were synthesized in this study. These derivatives were evaluated for their in vitroactivity against some mycobacteria. All of the synthesized compounds were less active than the parent 8-OCH3 ciprofloxacin against Mycobacteriumsmegmatis CMCC 93202, but most of the methylene isatin derivatives
Copper-Catalyzed Selective <i>N</i>-Vinylation of 3-(Hydroxyimino)indolin-2-ones with Alkenyl Boronic Acids: Synthesis of <i>N</i>-Vinyl Nitrones and Spirooxindoles
作者:Chun-Hua Chen、Qing-Qing Liu、Xiao-Pan Ma、Yu Feng、Cui Liang、Cheng-Xue Pan、Gui-Fa Su、Dong-Liang Mo
DOI:10.1021/acs.joc.7b00620
日期:2017.6.16
A copper-catalyzed selective cross-coupling reaction of 3-(hydroxyimino)indolin-2-ones with alkenylboronicacids to access (E)-N-vinyl oxindole nitrones has been achieved under mild conditions. The studies showed that catalytic copper salt selectively gave mono N-vinylation products, while 2.0 equiv of copper salt provided double N-vinylation products. The control experiments revealed that the carbonyl
Synthesis of Isatin 3-Oximes from 2-Nitroacetanilides
作者:Timothy Kearney、Philip A. Harris、Arthur Jackson、John A. Joule
DOI:10.1055/s-1992-26223
日期:——
2-Nitroacetanilides, prepared by alkaline hydrolysis of 1-arylamino-1-methylthio-2-nitroethenes, are converted into isatin (1H-indole-2,3-dione) 3-oximes by treatment with concentrated sulfuric acid or trifluoromethanesulfonic acid at room temperature.
Hydropyrrolo[2,3-b]indole is a privileged indoline motif, while its analogue, hydropyrrolo[3,2-b]indole, has been much less explored. Herein, we developed a cascade reaction of oxindole-derived nitrones with allenoates, providing straightforward access to the tetracyclic hydropyrrolo[3,2-b]indole scaffolds. Formation of multiple C–C/C–X bonds and cleavage could be achieved within one synthetic step
Hydropyrrolo[2,3- b ]indole 是一种特殊的二氢吲哚基序,而其类似物 hydropyrrolo[3,2- b ]indole 则鲜为人知。在此,我们开发了羟吲哚衍生的硝酮与联烯酸酯的级联反应,提供了四环氢吡咯并 [3,2- b ] 吲哚支架的直接途径。多个 C-C/C-X 键的形成和裂解可以在温和条件下使用一种简单的催化剂 (Gimeracil) 在一个合成步骤中实现。反应途径可能涉及作为关键中间体的螺氢氮杂酮的产生。