Synthesis of furan-2-ones and spirofuran-2,3'-indoline derivatives using polyether sulfone sulfamic acid catalysis

Polyether sulfone sulfamic acid (PES-NHSO3H) was prepared by simple sulfonation of a modified polyether sulfone. The number of acidic sites (SO3H) was determined to be 4.23 mmol H+/g by acid-base titration and 4.29 mmol H+/g by barium sulfate test. PES-NHSO3H was used as an efficient acidic catalyti...

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Veröffentlicht in:	Scientific reports 2024-10, Vol.14 (1), p.26008
Hauptverfasser:	Khatami, Seyed-Mola, Khalaj, Mehdi, Zarandi, Maryam, Zeynali, Taha, Shahvelayati, Ashraf S
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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