Selenium-Promoted Intramolecular Oxidative Amidation of 2-(Arylamino)acetophenones for the Synthesis of<i>N</i>-Arylisatins
作者:Yong Liu、Hui Chen、Xiong Hu、Wang Zhou、Guo-Jun Deng
DOI:10.1002/ejoc.201300477
日期:2013.7
A convenient method for the synthesis of N-arylisatins from 2-(arylamino)acetophenones by using SeO2 as an oxidant is described. Various substituted N-arylisatins were selectively obtained in good to excellent yields. The reaction tolerates a wide range of functionalities.
Copper-catalyzed tandem oxidative cyclization of arylacetamides: efficient access to N-functionalized isatins
作者:Jie Sun、Bingxin Liu、Bin Xu
DOI:10.1039/c3ra40657a
日期:——
An efficient copper-catalyzed synthesis of N-substituted isatins has been developed in good yields from easily accessible arylacetamides. A wide range of electronically and structurally varied nitrogen fragments could be assembled through this tandem C–O/C–N bond-forming process by tuning the reaction conditions.
Catalytic Enantioselective Ynamide Additions to Isatins: Concise Access to Oxindole Alkaloids
作者:Max Moskowitz、Christian Wolf
DOI:10.1002/anie.201814074
日期:2019.3.11
catalyzed by a bisoxazolidine copper complex under mild, base‐free reaction conditions, is described. The reaction is broad in scope, scalable, applicable to unprotected isatins, and provides efficient access to 3‐hydroxyoxindoles carrying a tetrasubstituted chiral center with excellent yields and enantioselectivities. Synthetically versatile, multifunctional 3‐hydroxyindolinones are obtained by hydration
Organocatalytic Insertion of Isatins into Aryl Difluoronitromethyl Ketones
作者:Ransheng Ding、Pegah R. Bakhshi、Christian Wolf
DOI:10.1021/acs.joc.6b02704
日期:2017.1.20
An organocatalytic method that achieves insertion of isatins into aryl difluoronitromethyl ketones under mild conditions is described. The reaction occurs in the presence of 20 mol % of DBU and with 100% atom economy. A series of isatin derived difluoronitromethyl substituted tertiary alcohol benzoates and naphthoates were prepared in 81–99% yield. The general synthetic usefulness of these 3-hydroxyoxindole