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

• Autorzy: Gharib A. , Daneshtalab M. , Scheeren J.(H.)W. , Bamoharram F.F. , Roshani M. , Jahangir M.
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

heteropoly acid; catalyst; Preyssler; isatin; mandelonitrile

PL

heteropolikwasy; katalizator; izatyna

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2009
• Tom: Vol. 11, nr 3
• Strony: 5--7
• Opis fizyczny: Bibliogr. 9 poz. rys., tab.

Twórcy

autor

Gharib A.

autor

Daneshtalab M.

autor

Scheeren J.(H.)W.

autor

Bamoharram F.F.

autor

Roshani M.

autor

Jahangir M.

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

Bibliografia

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• 4. Joaquim, F. M., Simon, J. G. & Angelo, C. P. (2001). The Chemistry of Isatins: a Review from 1975 to 1999. J. Braz. Chem. Soc. 12 (3), 273-324. DOI: 10.1590/S0103-50532001000300002.
• 5. Bergman, J., Lindström, J. O. & Tilstam, U. (1985). The structure and properties of some indolic constituents in Couroupita guianensis aubl. Tetrahedron. 41 (14), 2879-2881. DOI:10.1016/S0040-4020(01)96609-8.
• 6. Kapadia, G. J., Shukla, Y. N., Basak, S. P., Sokoloski, E. A. & Fales, H. M. (1980). The melosatins a novel class of alkaloids from melochia tomentosa. Tetrahedron. 36, 2441-2447. DOI:10.1016/0040-4020(80)80221-3.
• 7. Hodges, R. J., Ronaldson, W., Taylor, A. & White, E. P. (1963). Sporidesmins. Part II. The structure of degradation products related to 5-chloro-6,7-dimethoxyisatin. J. Chem. Soc. 5332-5336. DOI: 10.1039/JR9630005332.
• 8. Gulland, J. M., Robinson, R., Scott, J. & Thornley, S. (1929). 6: 7-Dimethoxyisatin, 5: 6-methylenedioxyisatin, and the nuclear degradation of 3: 4-methylenedioxyquindoline. J. Chem. Soc. 2924-2927. DOI: 10.1039/JR9290002924.
• 9. Bamoharram, F. F., Heravi, M. M., Roshani, M., Gharib, A. & Jahangir, M. (2006). A catalytic method for synthesis of γ-butyrolactone, ε-caprolactone and 2-cumaranone in the presence of Preyssler's anion, [NaP5W30O110]14-, as a green and reusable catalyst. J. Mol. Catal. 252, 90-95. DOI:10.1016/j.molcata.2006.01.067.