<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">An efficient method for the preparation of 6,7-dimethoxyisatin and its derivatives was developed with good yield by using Preyssler-type heteropolyacid (HPA) as acid catalyst under green conditions. The comparison between Keggin type heteropolyacids, H3[PW12O40], H4[SiW12O40] and H4[SiMo12O40], H3[PMo12O40] and mineral acids with Preyssler's anion shows that the latter possess better catalytical activity than the other heteropolyacids and no degradation of the structure was observed.</abstract>

An efficient method for the preparation of 6,7-dimethoxyisatin and its derivatives was developed with good yield by using Preyssler-type heteropolyacid (HPA) as acid catalyst under green conditions. The comparison between Keggin type heteropolyacids, H3[PW12O40], H4[SiW12O40] and H4[SiMo12O40], H3[PMo12O40] and mineral acids with Preyssler's anion shows that the latter possess better catalytical activity than the other heteropolyacids and no degradation of the structure was observed.

Novel catalytic synthesis of 6,7-dimethoxyisatin with the use of heteropolyacids (HPAs) as acid solid catalyst

Department of Chemistry, School of Science, Islamic Azad University, Mashhad, IRAN

Agricultural Researches and Services Center, Mashhad, IRAN

School of Pharmacy, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3V6

Cluster for Molecular Chemistry, Department of Organic Chemistry, Radboud University Nijmegen, The Netherlands

Polish Journal of Chemical Technology

An efficient method for the preparation of 6,7-dimethoxyisatin and its derivatives was developed with good yield by using Preyssler-type heteropolyacid (HPA)...

Novel catalytic synthesis of 6,7-dimethoxyisatin with the use of heteropolyacids (HPAs) as acid solid catalyst

Online veröffentlicht: 09. Okt. 2009

Seitenbereich: 5 - 7

DOI: https://doi.org/10.2478/v10026-009-0028-8

Schlüsselwörter
Heteropolyacid, catalyst, Preyssler, Isatin, mandelonitrile

This content is open access.

Novel catalytic synthesis of 6,7-dimethoxyisatin with the use of heteropolyacids (HPAs) as acid solid catalyst

Online veröffentlicht: 09. Okt. 2009

Seitenbereich: 5 - 7

DOI: https://doi.org/10.2478/v10026-009-0028-8

SchlüsselwörterHeteropolyacid, catalyst, Preyssler, Isatin, mandelonitrile

This content is open access.

Schlüsselwörter
Heteropolyacid, catalyst, Preyssler, Isatin, mandelonitrile