Role of various heteropolyacids in the reaction of 4-hydroxycoumarin, aldehydes and ethylcyanoacetate
The effects of various heteropolyacids including Preyssler, Wells-Dawson and Keggin regarding the yields and types of products in the reaction of 4-hydroxycoumarin, aldehydes and ethylcyanoacetate have been investigated. The results show that dihydropyrano[3,2-c]chromenes were obtained in the presen...
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| Published in | Catalysis communications Vol. 10; no. 13; pp. 1643 - 1646 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
25.07.2009
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| Subjects | |
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| Abstract | The effects of various heteropolyacids including Preyssler, Wells-Dawson and Keggin regarding the yields and types of products in the reaction of 4-hydroxycoumarin, aldehydes and ethylcyanoacetate have been investigated. The results show that dihydropyrano[3,2-c]chromenes were obtained in the presence of Preyssler and Wells-Dawson as the only products while in the presence of Keggins, this reaction led to formation of two compounds including bis-coumarins as major and dihydropyrano[3,2-c]chromenes as minor products. |
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| AbstractList | The effects of various heteropolyacids including Preyssler, Wells-Dawson and Keggin regarding the yields and types of products in the reaction of 4-hydroxycoumarin, aldehydes and ethylcyanoacetate have been investigated. The results show that dihydropyrano[3,2-c]chromenes were obtained in the presence of Preyssler and Wells-Dawson as the only products while in the presence of Keggins, this reaction led to formation of two compounds including bis-coumarins as major and dihydropyrano[3,2-c]chromenes as minor products. |
| Author | Heravi, Majid M. Bamoharram, Fatemeh F. Haj, Negar Mokhtari Oskooie, Hossein A. Sadjadi, Samaheh |
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| Title | Role of various heteropolyacids in the reaction of 4-hydroxycoumarin, aldehydes and ethylcyanoacetate |
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