Synthesis of substituted pyrazolo[3,4-d]pyrimidines by reactions of 5-amino-1-phenyl-1H-pyrazole derivatives with N-substituted isatins
作者:Yevgeniya A. Kosheleva、Svetlana M. Medvedeva、Khidmet S. Shikhaliev、Fedor I. Zubkov、Elena A. Ryzhkova、Mikhail A. Prezent
DOI:10.1007/s10593-016-1935-2
日期:2016.8
The reaction of N-substituted isatins with 5-amino-1-phenyl-1H-pyrazole-4-carboxamide in refluxing methanol in the presence of excess sodium methoxide led to cyclocondensation with the formation of 1-R-1'-phenyl-1',7'-dihydrospiro[indole-3,6'-pyrazolo[3,4-d]pyrimidine]-2,4'(1H,5'H)-diones. Analogous reaction with 5-amino-1-phenyl-1H-pyrazole-4-carbonitrile was a cascade process that involved the formation
在过量甲醇钠存在下 ,N-取代的靛红与5-氨基-1-苯基-1 H-吡唑-4-羧酰胺在回流甲醇中的反应导致环缩合,形成1 - R -1'-苯基- 1' ,7'-二氢螺[吲哚3,6'吡唑并[3,4- d ]嘧啶] -2,4- '(1 ħ,5' ħ) -二酮。与5-氨基-1-苯基-1 H-吡唑-4-腈的类似反应是一个级联过程,涉及形成1-R-4'-(甲氧基)-1'-苯基-1',7'-二氢螺[吲哚-3,6'-吡唑并[3,-吡唑并[3,4- d ]嘧啶-6-基]苯胺。
INDOLINONE COMPOUND
申请人:Kaku Hidetaka
公开号:US20110009379A1
公开(公告)日:2011-01-13
[Problems] A compound, which is useful as an active ingredient for a pharmaceutical composition, for example a pharmaceutical composition for treating constipation-type irritable bowel syndrome, atonic constipation and/or functional gastrointestinal disorder, is provided.
[Means for Solution] The present inventors have extensively studied compounds having TRPA1 channel activation activity, and confirmed that an indolinone compound has a TRPA1 channel activation activity, and thus completed the present invention. The indolinone compound of the present invention has a TRPA1 channel activation activity and can be used as an active ingredient of a pharmaceutical composition for preventing and/or treating constipation-type irritable bowel syndrome, atonic constipation and/or functional gastrointestinal disorder or the like.
An Efficient Route to 3,3′‐Biindolinylidene‐diones by Iron‐Catalyzed Dimerization of Isatins
作者:Rahul A. Jagtap、Chandini Pradhan、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1002/asia.202200414
日期:2022.8
Iron(0)-catalyzed self-dimerization and cross-dimerization of isatins is described that provides an easy and efficient access to diverse 3,3′-biindolinylidene-diones
描述了铁 (0) 催化的靛红的自二聚和交叉二聚,可轻松有效地获得多种 3,3'-联茚亚基二酮
Boryl Radical-Promoted Dehydroxylative Alkylation of 3-Hydroxyoxindole Derivatives
alkylation of 3-hydroxy-oxindole derivatives is achieved. The reaction starts from addition of 4-dimethylaminopyridine (DMAP)-boryl radical to the amide carbonyl oxygen atom, which induces a spin-center shift process to promote the C–O bond cleavage. The elimination of a hydroxide anion from a free hydroxy group is also accomplished. Capture of the generated carbon radical with alkenes furnishes a variety
Palladium-Catalyzed Chemoselective Oxygenation of C(sp<sup>2</sup>)–H and C(sp<sup>3</sup>)–H Bonds in Isatins
作者:Muniyappa Vijaykumar、Chandini Pradhan、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1021/acs.orglett.3c00342
日期:2023.3.24
The palladium-catalyzed chemoselective C(sp2)–H and C(sp3)–H bond oxygenation of substituted isatin derivatives is reported. This mild protocol exhibits the C5 C(sp2)–H oxygenation of isatins through electrophilic intermolecular C–H palladation in concentrated solutions using PhI(OAc)2 or Selectfluor as an oxidant, whereas it exhibits–N–CH3 C(sp3)–H oxygenation in dilute solutions via carbonyl-assisted