A Sulfonated Phenanthrolinum Salt of Phosphotungstate as Novel Catalyst for the Efficient Synthesis of 3, 3′-Diaryloxindoles. (7th February 2021)

• Record Type: Journal Article
• Authors: Keshavarz, Mosadegh; Tabatabaee, Masoumeh; Shahabi, Maryam; Yazdankish, Enayatolah
• Is Part Of: Polycyclic aromatic compounds. Volume 41:Number 2(2021)
• Page Start: 427
• Page End: 439
• Publication Date: 2021-02-07
• Subjects: 1, 10-Phenanthroline -- 3, 3′-diaryloxindole -- butane sultone -- heteropoly acid -- ionic liquid catalyst; Polycyclic aromatic compounds -- Periodicals; 547
• DOI: 10.1080/10406638.2019.1593864
• Languages: English
• ISSNs: 1040-6638

Abstract

Abstract: A novel heteropolyanion-based Brønsted acidic ionic liquid (BAIL) material [PhBs]3 PW12 O40, butane mono sulfoacid-functionalized phenanthrolinum salt of phosphotungstate catalyst (PhBs-PW), was synthesized and characterized with FTIR, 1 H and 13 C NMR, Electro-Spray Ionization Mass Spectrometry (ESI-MS), EDX, FE-SEM, and TG analysis. The new prepared catalyst was used for the efficient synthesis of 3, 3́́-diaryloxindole derivatives from the condensation of indole with isatins in water under reflux condition. The resultant condensation reaction using the introduced catalyst showed high yields of the products up to 97% and good recyclability of the catalyst confirmed in eight reusability runs.