| Autor: |
Rashidi, Amir, Mosslemin, Mohammad H., Hassanabadi, Alireza |
| Předmět: |
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| Zdroj: |
Organic Preparations & Procedures International; 2023, Vol. 55 Issue 5, p476-482, 7p |
| Abstrakt: |
The 2-[2-(aryl)-2-oxoethyl)]pyridinium bromide B 3 b undergoes deprotonation in the presence of theophylline to give the reactive pyridinium ylide B 5 b at room temperature. We have found that the spiro[benzofurancyclobutane] derivatives ( B 4 b ) could be prepared in an aqueous medium by condensation of 1,3-cyclohexanedione (or dimedone) ( B 1 b ), 3,4-dihydroxycyclobut-3-ene-1,2-dione ( B 2 b ) and pyridinium ylide ( B 3 b ) in the presence of theophylline (2 mol%). These single-pot reactions were carried out in the presence of theophylline (2 mol%) as an efficient and nontoxic base catalyst. [Extracted from the article] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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