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

Ali Gharib; Mohsen Daneshtalab; J. Scheeren; Fatemeh Bamoharram; Mina Roshani; Manouchehr Jahangir

doi:10.2478/v10026-009-0028-8

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

Green Sciences

Volume 11 (2009): Issue 3 (September 2009)

By: Ali Gharib, Mohsen Daneshtalab, J. Scheeren, Fatemeh Bamoharram, Mina Roshani and Manouchehr Jahangir

Open Access

|Oct 2009

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.

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Articles in this issue

DOI: https://doi.org/10.2478/v10026-009-0028-8 | Journal eISSN: 3072-0389 (formerly 1899-4741) | Journal ISSN: 1509-8117

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Language: English

Page range: 5 - 7

Published on: Oct 9, 2009

Published by: West Pomeranian University of Technology, Szczecin

In partnership with: Paradigm Publishing Services

Publication frequency: Volume open

Keywords:

Isatin,

Related subjects:

Industrial chemistry,

Biotechnology,

Chemical engineering,

Process engineering

© 2009 Ali Gharib, Mohsen Daneshtalab, J. Scheeren, Fatemeh Bamoharram, Mina Roshani, Manouchehr Jahangir, published by West Pomeranian University of Technology, Szczecin
This work is licensed under the Creative Commons License.

Volume 11 (2009): Issue 3 (September 2009)