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Microwave Assisted Reaction of Condensed Thiophenes With Electron Poor Olefins
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 Title & Authors
Microwave Assisted Reaction of Condensed Thiophenes With Electron Poor Olefins
Al-zaydi, Khadijah M.; Elnagdi , Mohamed H.;
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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.Η⨀ἀ ￿￿က ༅Ā?Η⨀?Η⨀￿￿￿￿ꡉΗ⨀老䈈骈Η⨀﨨㜄촒က끛Η⨀ሀ老
Microwave;Thiophene;Cycloaddition Reaction;
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