Counterion Control of
<i>t</i>
‐BuO‐Mediated Single Electron Transfer to Nitrostilbenes to Construct
<i>N</i>
‐Hydroxyindoles or Oxindoles
作者:Yingwei Zhao、Haoran Zhu、Siyoung Sung、Donald J. Wink、Joseph M. Zadrozny、Tom G. Driver
DOI:10.1002/anie.202104319
日期:2021.8.23
tert-Butoxide unlocks new reactivity patterns embedded in nitroarenes. Exposure of nitrostilbenes to sodium tert-butoxide was found to produce N-hydroxyindoles at room temperature without an additive. Changing the counterion to potassium changed the reaction outcome to yield solely oxindoles through an unprecedented dioxygen-transfer reaction followed by a 1,2-phenyl migration. Mechanistic experiments
One-pot synthesis of 3-hydroxy-2-oxindoles <i>via</i> acyloin rearrangements of 2-hydroxy-indolin-3-ones generated <i>in situ</i> from 2-alkynyl arylazides
A novel one-pot method to prepare 3-hydroxy-2-oxindoles via acyloin rearrangements of 2-hydroxy-indolin-3-ones generated in situ from 2-alkynyl arylazides has been described. The reaction was accomplished to afford a variety of 3-hydroxy-2-oxindole derivatives in moderate to good yields under mild conditions.
[EN] 3-HYDROXYOXINDOLE DERIVATIVES AS CRHR2 ANTAGONIST<br/>[FR] DÉRIVÉS DE 3-HYDROXYOXINDOLE UTILES EN TANT QU'ANTAGONISTES DU CRHR2
申请人:RAQUALIA PHARMA INC
公开号:WO2022071484A1
公开(公告)日:2022-04-07
The present invention relates to 3-hydroxyoxindole derivatives which have antagonistic activities against CRHR2, and which are useful in the treatment or prevention of disorders and diseases in which CRHR2 is involved. The invention also relates to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CRHR2 is involved.
Bifunctional chiral 4-aryl-pyridine-N-oxides (ArPNO) were reported for the acylative kineticresolution of 3-hydroxy-3-substitutedoxindoles, where the oxygen acts as the nucleophilic site. Using less sterically hindered acetic anhydride, both the recovered tertiary heterocyclic alcohols and the ester products exhibited good to excellent results with s-factors up to 167. Control experiments supported
Synthesis of Sulfur-Containing Oxindoles by Photoinduced Alkene Difunctionalization via Sulfur 1,2-Relocation
作者:Cong Lu、Rui Chen、Rui Wang、Dong Jing、Ke Zheng
DOI:10.1021/acs.orglett.2c04189
日期:2023.2.10
which have been widely applied in agrochemicals and pharmaceuticals. Herein, a new approach for the efficient construction of sulfur-containing oxindoles by photoinduced alkene difunctionalization via sulfur 1,2-relocation is developed. The method exhibited a high functional group tolerance and broad substrate compatibility. A library of sulfur-containing oxindole derivatives were synthesized under mild