Results 51 to 60 of about 2,987 (182)

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Azobenzene‐Oxindole Photochromic Dyads

Angewandte Chemie
Abstract Manipulation of molecular geometry using photoresponsive units is a powerful tool in supramolecular chemistry, smart materials, and photopharmacology. Current synthetic chemistry offers many responsive molecules that perform such a task.
Ovalle, Marco, Doellerer, Daniel, Feringa, Ben L   +2 more
openaire   +3 more sources

Flipping the Card With Enantiodivergent Organocatalysis

Chemistry – A European Journal, EarlyView.
This minireview elaborates on recent organocatalytic strategies for achieving enantiodivergence—the ability to access both product enantiomers using a single chiral catalyst. It highlights how achiral stimuli, such as solvent polarity and chemical additives, along with minimal catalyst modifications, trigger stereochemical inversions in reactions ...
Debora Iapadre, Alessio Carioscia, Alessandro Brusa, Armando Carlone   +3 more
wiley   +1 more source

Visible light mediated aerobic oxidative hydroxylation of 2-oxindole-3-carboxylate esters: an alternative approach to 3-hydroxy-2-oxindoles

Heterocyclic Communications, 2020
A convenient aerobic oxidative hydroxylation of 3-substituted oxindoles under mild reaction conditions is described herein. This process was accomplished by the activation of molecular oxygen in the air in the presence of a photocatalyst under the ...
Wang Jinge, Osman Siyitemer, Lu Xinjiang, Chen Junyi, Xia Xu-Dong   +4 more
doaj   +1 more source

A novel methodology for the efficient synthesis of 3-monohalooxindoles by acidolysis of 3-phosphate-substituted oxindoles with haloid acids

Beilstein Journal of Organic Chemistry, 2021
A novel method for the synthesis of 3-monohalooxindoles by acidolysis of isatin-derived 3-phosphate-substituted oxindoles with haloid acids was developed.
Li Liu, Yue Li, Tiao Huang, Dulin Kong, Mingshu Wu   +4 more
doaj   +1 more source

Chemo-/Regio-Selective Synthesis of Novel Functionalized Spiro[pyrrolidine-2,3′-oxindoles] under Microwave Irradiation and Their Anticancer Activity

Molecules, 2023
A novel series of nitrostyrene-based spirooxindoles were synthesized via the reaction of substituted isatins 1a–b, a number of α-amino acids 2a–e and (E)-2-aryl-1-nitroethenes 3a–e in a chemo/regio-selective manner using [3+2] cycloaddition (Huisgen ...
Richa Sharma, Lalit Yadav, Ali Adnan Nasim, Ravi Kant Yadav, Rui Hong Chen, Neha Kumari, Fan Ruiqi, Ashoke Sharon, Nawal Kishore Sahu, Sirish Kumar Ippagunta, Paolo Coghi, Vincent Kam Wai Wong, Sandeep Chaudhary   +12 more
doaj   +1 more source

Auxin activity of 3-hydroxymethyl oxindole and 3-methylene oxindole in oat

Biologia Plantarum, 1986
Two photooxidation products of indol-3-ylacetic acid (IAA), 3-hydroxymethyl oxindole (HMO) and 3-methylene oxindole (Meox) were almost as effective as IAA in stimulation of growth of oat (Avena saliva cv. Kent) coleoptile sections. The IAA failed to give stimulation of growth after pretreatment of the coleoptiles with chemicals inhibiting oxidation of ...
R. N. Bhattacharyya, K. K. Chattopadhyay, P. S. Basu   +2 more
openaire   +1 more source

Dual‐Stabilized Single‐Site Fe(II) for Catalytic Conversion of CO2 to Propiolic Acid Under Ambient Condition

EcoEnergy, EarlyView.
We develop a highly cost‐effective heterogeneous catalyst for efficient CO2 conversion to propiolic acid under mild conditions via a nano‐confined approach with porous MIL support. ABSTRACT Efficient conversion of carbon dioxide to organics has been a promising outlet for value‐added carbon dioxide consumption.
Bin Lei, Zhenzhen Zhou, Xiao Liu, Bo Li, Wenyuan Wang, Jian‐Gong Ma, Peng Cheng   +6 more
wiley   +1 more source

SYNTHESIS AND ANTIVIRAL ACTIVITY OF NEW THIAZOLE, 1,2,4-TRIAZOL AND OXINDOLE DERIVATIVES [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2011
The synthesis and antiviral activity evaluation of new derivatives of 2-aminothiazole, 1,2,4-triazole, as well as oxindoles has been realized. The synthesized compounds exhibited different cytotoxicity, in particular, oxindols 4 , 5 , 7 , 8 , 9, 10, 11,
Oleg Radul, Natalia Sucman, Serghei Pogrebnoi, Alic Barba, Athina Geronikaki, Fliur Macaev   +5 more
doaj  

Development of Bifunctional Chiral Thioureas and Thiosquaramides in the Synthesis of Betti Bases

Molecules, 2023
Bifunctional thioureas and, for the first time, bifunctional thiosquaramides as organocatalysts were used in the asymmetric Betti reaction involving 1-, 2-naphthols and hydroxyquinoline with N-tosylimine and ketimine.
Martyna Malinowska, Anna Zawisza
doaj   +1 more source