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

• Authors: Ali Gharib , Mohsen Daneshtalab , J. Scheeren , Fatemeh Bamoharram , Mina Roshani , Manouchehr Jahangir
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

Heteropolyacid; catalyst; Preyssler; Isatin; mandelonitrile

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2009
• Volume: 11
• Issue: 3
• Pages: 5-7

Dates

published

1 - 1 - 2009

online

9 - 10 - 2009

Contributors

author

Ali Gharib

author

Mohsen Daneshtalab

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

author

J. Scheeren

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

author

Fatemeh Bamoharram

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

author

Mina Roshani

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

author

Manouchehr Jahangir

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

References

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Identifiers

DOI

10.2478/v10026-009-0028-8