Results 81 to 90 of about 1,887 (208)

Catalytic asymmetric synthesis of biologically important 3-hydroxyoxindoles: an update

open access: yesBeilstein Journal of Organic Chemistry, 2016
Oxindole scaffolds are prevalent in natural products and have been recognized as privileged substructures in new drug discovery. Several oxindole-containing compounds have advanced into clinical trials for the treatment of different diseases. Among these
Bin Yu   +3 more
doaj   +1 more source

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

open access: yesMolecules, 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   +12 more
doaj   +1 more source

Синтез і хімічні властивості конденсованих та спіросполучених похідних піролу [PDF]

open access: yes, 2018
У дисертаційній роботі досліджено стереохімію та регіонаправленість фор-мування продуктів у процесах 1,3-диполярного циклоприєднання азометин-ілідів на основі ізатину та циклічних і аліфатичних α-амінокислот до похідних N-заміщених малеїнімідів ...
Павловська, Т.Л.
core  

Synthesis, characterization and thermal decomposition of 2’-amino-6’-(1H-indol-3-yl)-1-methyl-2-oxospiro-[indoline-3,4’-pyran]-3’,5’-dicarbonitrile under non-isothermal condition in nitrogen atmosphere [PDF]

open access: yes, 2016
The kinetics and decomposition of a new spirooxindole compound, 2’-amino-6’-(1H-indol-3-yl)-1-methyl-2-oxospiro[indoline-3,4’-pyran]-3’,5’-dicarbonitrile was studied by thermo gravimetric technique under non-isothermal conditions.
Jayachandramani, Natesan   +4 more
core   +1 more source

Stereoselective Synthesis of Spirooxindole Amides through Nitrile Hydrozirconation [PDF]

open access: yesOrganic Letters, 2010
Spirooxindole amides can be prepared by the intramolecular addition of functionalized indoles into acylimines that are accessed from nitriles by hydrozirconation and acylation. The stereochemical outcome at the quaternary center was controlled by the steric bulk of the substituent at the 2-position of the indole unit.
Chunliang, Lu   +2 more
openaire   +2 more sources

Construction of Spirooxindole Skeleton Through Intramolecular Dieckmann Cyclization

open access: yesNatural Products and Bioprospecting, 2017
A highly efficient and direct approach was developed to construct the structurally diverse spirooxindole skeleton, which is an important basic motif in natural products.
Ting Wu, Zhiqiang Pan, Chengfeng Xia
doaj   +1 more source

6′-Amino-5,7-dibromo-2-oxo-3′-(trifluoromethyl)-1′H-spiro[indoline-3,4′-pyrano[2,3-c]pyrazole]-5′-carbonitrile

open access: yesMolbank, 2021
The multicomponent reactions are environmentally benign synthetic methods of building-up of complex molecules and several levels of structural diversity for diverse applications.
Yuliya E. Ryzhkova   +2 more
doaj   +1 more source

Molecular Iodine Catalysed One Pot Synthesis of Spirooxindoles by Tandem Knoevenagel Cyclisation [PDF]

open access: yes, 2021
Spirooxindoles are heterocycles found in various natural and synthetic products with potent bio-, physio-, and pharmaceutical activities. Heterocyclic fused phthalazines possess   antimicrobial, antifungal, anticancer, anti- inflammatory, and ...
Anitha Varghese, Aatika Nizam
core   +2 more sources

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

open access: yesResults in Chemistry, 2020
With their exceptional three-dimensional structural topographies, spirooxindoles are known best for privileged chemotypes for diverse biological applications.
Dhruba Jyoti Boruah   +2 more
doaj   +1 more source

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

open access: yesAngewandte 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   +3 more
wiley   +1 more source

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