Sucrose catalyzes synthesis of 2-amino-4H-chromene: Insight to the kinetics
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Sayeydmosatfa Habibi-Khorassani
1, 2, 3, 4, 5
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Malek Taher Maghsoodlou
6
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Mehdi Shahraki
1, 2, 3, 4, 5
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Mohammad Ali Poorshamsoddin
1, 2, 3, 4, 5
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Mahsa Karima
1, 2, 3, 4, 5
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Maliheh Abbasi
1, 2, 3, 4, 5
- Department of Chemistry
- Faculty of Science
- University of Sistan and Baluchestan
- Zahedan, Iran
- P.O. Box: 98135-674
- Chemistry Department, Faculty of Science, University of Sistan and Baluchestan, Zahedan, Iran
Abstract
Sucrose is applied as an efficient catalyst for the three-component reaction consisting of aromatic aldehydes, malononitrile and resorcinol in a mixture of water and ethanol media as green solvents. The advantages of this method are excellent yeild, inexpensive catalyst and more environmentally friendly. Mechanistic insight into the synthesis of 2-amino-4H-chromene included spectral kinetics approaches is revealed. From the temperature, concentration and solvent studies, the activation energy (Ea=102 kJmol-1) and the related kinetic parameters (ÎGÇ=41 kJmol-1, ÎSÇ=195 Jmol-1 and ÎHÇ=99 kJ mol-1) are calculated. The first step of proposed mechanism is recognized as a rate-determining step (k1) and this is confirmed based upon the steady-state approximation.