Efficient synthesis of spirooxindole derivatives by magnetic and recyclable CaFe2O4@MgAl-LDH

Varma R. An Overview of Recent Advances in Isatin-Based Multicomponent Reactions

Abstract:

Isatin has been widely deployed in multicomponent reactions to prepare diverse heterocyclic compounds, which have garnered the attention of organic chemists considering their anti-inflammatory, anti-microbial, and antiviral activities, among others. This review discusses the applications of isatin in multicomponent reactions from 2019 to 2022. Isatin has been used as a raw material in multicomponent reactions due to its diverse biological and therapeutic activities. This overview may help stimulate the readers to exploit such convergent strategies in their synthetic endeavors.

Expeditious entry into carbocyclic and heterocyclic spirooxindoles

Spirocyclic frameworks have attracted synthetic practitioners due to their unique three-dimensional assembly, improved metabolic stability, solubility, and increased molecular complexity with regard to planar architectures. A recent surge in the number of spirocyclic oxindoles inhibiting enzymes, moderating unique protein-protein interactions, modulating receptors and transporters is testament to their prevalence. Against this background, the construction of spirocyclic frameworks containing an oxindole moiety as a torsional switch via stereoselective methods is in great demand. Herein we present a summary of the past three years in the progress of metal, organic molecule, nanostructured particle mediated, and even uncatalyzed versions of the highly diastereo- and enantioselective pathways leading to oxindole spirocycles.

A green and sustainable approach for the synthesis of 1,5-benzodiazepines and spirooxindoles in one-pot using a MIL-101(Cr) metal–organic framework as a reusable catalyst

Green and efficient protocols for the synthesis of 1,5-benzodiazepines and spirooxindoles were developed utilizing MIL-101(Cr) in SFRC and water as solvent respectively.