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http://dx.doi.org/10.5012/jkcs.2003.47.6.591

Microwave Assisted Reaction of Condensed Thiophenes With Electron Poor Olefins  

Al-zaydi, Khadijah M. (Department of Chemistry, Girls College of Education)
Elnagdi , Mohamed H. (Department of Chemistry, Faculty of Science, Cairo University)
Publication Information
Journal of the Korean Chemical Society / v.47, no.6, 2003 , pp. 591-596 More about this Journal
Abstract
Aminothienopyridazines 1a, b and aminothienocoumarin 2 condensed with DMFDMA to yield amidines 3a, b and 4. These compounds reacted with N-phenylmaleimide to yield 9 and 10. On the other hand reacting 3a, b, 4, 18, 19 and 20 with maleic anhydride afforded only the formylated derivatives 5a, b, 6, 21, 22 and 23 respectively. The reaction of 3a, b with diethyl fumarate afforded 11, formed most likely via hydrolysis of the amidine 14 during working up the reaction mixture. Irradiation of N-phenylmaleimide in microwave oven afforded [2+2] and [2+2+2] cycloaddition product.
Keywords
Microwave; Thiophene; Cycloaddition Reaction;
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