Results 51 to 60 of about 555 (125)

Chemo-selective Synthesis of [indoline-3,4'-isoxazolo[5,4-b]pyridine Fused spirooxindole Derivatives via Brønsted Acid Catalysed Three–Component Tandem Knoevenagel/Michael Addition Reaction

Results in Chemistry, 2020
With their exceptional three-dimensional structural topographies, spirooxindoles are known best for privileged chemotypes for diverse biological applications.
Dhruba Jyoti Boruah, Ram Awatar Maurya, Panneerselvam Yuvaraj   +2 more
doaj   +1 more source

Biosynthetically‐Inspired Oxidative Cleavage Platform Enables Rapid Access to Diverse and Architecturally Complex Chemotypes From Indole Alkaloids

ChemistryEurope, Volume 4, Issue 4, April 2026.
We report a biosynthesis‐inspired ring distortion approach that involves oxidative ring cleavage, ring rearrangement, and ring expansion reactions from a diverse collection of indole alkaloids and derivatives. This chemical synthesis approach led to the synthesis of >25 distinct chemotypes from 14 indole alkaloids.
Derek A. Leas, Eli S. Levit, Alexis A. Bragg, Taylor A. Gerrein, Khalil A. Abboud, Pingrong Wei, Lukasz M. Dobrzycki, Robert W. Huigens III   +7 more
wiley   +1 more source

Discovery of a cytochrome P450 enzyme catalyzing the formation of spirooxindole alkaloid scaffold

Frontiers in Plant Science, 2023
Spirooxindole alkaloids feature a unique scaffold of an oxindole ring sharing an atom with a heterocyclic moiety. These compounds display an extensive range of biological activities such as anticancer, antibiotics, and anti-hypertension.
Tuan-Anh M. Nguyen, Dagny Grzech, Khoa Chung, Zhicheng Xia, Trinh-Don Nguyen, Thu-Thuy T. Dang   +5 more
doaj   +1 more source

Complete transfer of chirality in an intramolecular, thermal [2 + 2] cycloaddition of allene-ynes to form non-racemic spirooxindoles

Beilstein Journal of Organic Chemistry, 2011
A thermal [2 + 2] cycloaddition reaction of allene-ynes has been used to transform chiral non-racemic allenyl oxindoles into chiral non-racemic spirooxindoles containing an alkylidene cyclobutene moiety.
Kay M. Brummond, Joshua M. Osbourn
doaj   +1 more source

Catalytic Asymmetric Synthesis of gem‐Dicyano‐Spirocyclopropyl Oxindoles by N‐9‐Anth‐PyBidine‐Co(OAc)2: Advantage of Three‐Component Coupling Approach

ChemistryEurope, Volume 4, Issue 3, March 2026.
Chiral gem‐dicyano‐spirocyclopropyl oxindoles are obtained by a chiral N‐9‐Anth‐PyBidine‐Co(OAc)2‐catalyzed asymmetric Michael/alkylation reaction of 3‐chlorooxindoles with alkylidenemalononitriles. The three‐component coupling reaction of 3‐chlorooxindoles, aldehydes, and malononitrile shows the advantage of not requiring the preparation of ...
Takaaki Saito, Ren Miyasaka, Kazumasa Kon, Yuri Takagi, Takayoshi Arai   +4 more
wiley   +1 more source

Next‐Generation Proteolysis‐Targeting Chimeras in Precision Oncology: Multifunctional Designs, Emerging Modalities, and Translational Prospects in Targeted Protein Degradation

Drug Development Research, Volume 86, Issue 8, December 2025.
ABSTRACT Proteolysis‐targeting chimeras (PROTACs)‐mediated protein degradation has been recently developed as a game‐changing approach in oncology drug development. It represents a paradigm shift from traditional enzyme inhibition to selective protein degradation.
Mohamed S. Nafie, Mohamed K. Diab, Asmaa S. A. Yassen, Amany M. Elshamy, Mohamed R. El Tohamy, Haytham O. Tawfik, Sherif Ashraf Fahmy   +6 more
wiley   +1 more source

Pyrrolizine- and Indolizine-Derived Spirooxindoles: Synthesis, Antibacterial Activity and Inverse Docking Analysis

Chemistry
Spirooxindoles are a family of heterocyclic compounds which bear the oxindole nucleus in their structures, which have a considerable pharmaceutical potential and which have been linked to various drugs for the treatment of diverse diseases. In this work,
Pablo Romo, María del Pilar Crespo, Mauricio Barreto, María Elena Burbano, Melissa Mejia-Gutierrez, Jairo Quiroga, Rodrigo Abonia   +6 more
doaj   +1 more source

Advances in Enaminomaleimides Chemistry: Synthesis, Chemical Applications, and Perspectives

ChemistryEurope, Volume 3, Issue 5, September 18, 2025.
Enaminomaleimides are versatile building blocks for the construction of functionalized heterocycles. Their unique nucleophilic character, contrasting with the classical electrophilic nature of maleimides, enables diverse synthetic applications, showing promising potential in both materials science and medicinal chemistry.
Adrián López‐Francés, Birane Diop, Xingyu Jiang, Jean Rodriguez, Muriel Amatore, Thierry Constantieux   +5 more
wiley   +1 more source

Synthesis of Isoxazolopyridines and Spirooxindoles under Ultrasonic Irradiation and Evaluation of Their Antioxidant Activity

Journal of Chemistry, 2017
New polycyclic-fused isoxazolo[4,5-e]pyridines and spirooxindoles were obtained via multicomponent reaction of 5-amino-3-methylisoxazole, indan-1,3-dione, and aromatic aldehydes and reaction of 5-amino-3-methylisoxazole, isatin, and β-diketones in the ...
Emel Pelit
doaj   +1 more source

Electrochemical Enantioselective Oxidation of Indoles via Chiral Phosphoric Acid Catalysis in Cooperation with H3PO4 in Aqueous Media

Angewandte Chemie, Volume 137, Issue 33, August 11, 2025.
A binary organic–inorganic acid cooperative catalytic system has been developed to achieve highly enantioselective electrochemical oxidative rearrangement of indoles. The use of electricity as an oxidant in this case showed several advantages including environmental benignity and improved enantiocontrol.
Xuefeng Tan, Zhijie Zhou, Minhua Shao, Jianwei Sun   +3 more
wiley   +1 more source