Synthesis of 3-ethynyl-3-hydroxy-2-oxindoles and 3-hydroxy-3-(indol-3-yl) indolin-2-ones using CuWO4 nanoparticles as recyclable heterogeneous catalyst in aqueous medium
acetylenes (spC-H activation) and selective synthesis of 3-hydroxy-3-(indol-3-yl) indolin-2-ones and 3,3′-bis(indolyl)indolin-2-ones (via Friedel-Crafts alkylation reaction) is reported in presence of CuWO4 (10 mol%) nanoparticles in aqueous medium. The catalyst was regenerated and reused up to 6 cycles without losing catalytic activity. This is the first report for the spC-H activation using CuWO4
“On water”-promoted direct alkynylation of isatins catalyzed by NHC–silver complexes for the efficient synthesis of 3-hydroxy-3-ethynylindolin-2-ones
作者:Xiao-Pu Fu、Li Liu、Dong Wang、Yong-Jun Chen、Chao-Jun Li
DOI:10.1039/c0gc00807a
日期:——
The direct alkynylation of isatins catalyzed by NHCâAg complexes via the activation of alkyne CâH bond on water was developed for the efficient synthesis of 3-hydroxy-3-ethynylindolin-2-ones under an air atmosphere. A remarkable rate-enhancement by water in the aqueous heterogeneous system was observed.
Synthesis of oxindolyl-pyrimidines and oxindolyl-furopyrimidines from isatin-derived propargylic alcohols
作者:Majid M. Heravi、Afsaneh Feiz、Behrouz Notash、Ayoob Bazgir
DOI:10.1007/s13738-020-01893-3
日期:2020.7
AbstractA Brønsted acid-catalyzed reaction of 6-amino uracil and isatin-derived propargylic alcohols for the synthesis of a series of oxindole-fused pyrimidine in good-to-high yields was achieved (up to 94%). Furthermore, the reaction of isatin-derived propargylic alcohols and 1,3-dimethylbarbituric acid or ethyl 3-aminocrotonate gave oxindoles containing furopyrimidine or pyrrole, respectively, in
phenylacetylene to isatin and its N-substituted derivatives for the first time. This reaction involves activation of zinc reagent via coordination with carbonyl substrates that behave “ligand like.” The bioactivities on protective effect on the apoptosis of PC12 cells induced by H2O2 and cytotoxicity against lung cancer A549 and P388 cell line of these compounds were investigated, and several compounds showed
通过添加以下化合物合成了一系列炔丙醇 苯乙炔到Isatin及其N-取代的衍生物。该反应涉及通过与表现为“配体样”的羰基底物的配位来活化锌试剂。研究了这些化合物对H 2 O 2诱导的PC12细胞凋亡的保护作用的生物活性以及对这些化合物对肺癌A549和P388细胞系的细胞毒性,并且几种化合物均显示出有效的活性。杂环化学杂志,46,217(2009)。
[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.