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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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Czasopismo
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Tom
Strony
5--7
Opis fizyczny
Bibliogr. 9 poz. rys., tab.
Twórcy
autor
autor
autor
autor
autor
autor
- Department of Chemistry, School of Science, Islamic Azad University, Mashhad, IRAN, aligharib5@yahoo.com
Bibliografia
- 1. Romanelli, G., Autino J. C., Baronetti, G. & Thomas, H. (2001). H. Efficient Deprotection of Phenol Methoxymethyl Ethers Using a Solid Acid Catalyst with Wells-Dawson Structure. Molecules. 6, 1006-1011. DOI:10.3390/61201006.
- 2. Okuhara, T., Mizuno, N. & Misono, M. (1996). Advances in Catalysis. Catalytic Chemistry of Heteropoly compounds. 41, 113-252.
- 3. Kozhevnikov, I. V. (1987). Advances in catalysis by heteropoly acids. Advances in catalysis by heteropoly acids. Russ. Chem. Rev. 56(9), 811-825. DOI: 10.1070/RC1987v056n09ABEH003304.
- 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.
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Bibliografia
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bwmeta1.element.baztech-article-BPS2-0053-0002