Reactions of N,N-(dialkyl)arylthioacetamides with dialkyl acetylenedicarboxylates |
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| Authors: | Kosterina M F Morzherin Yu Yu Tkachev A V Rybalova T V Gatilov Yu V Bakulev V A |
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| Institution: | (1) Ural State Technical University, 19 ul. Mira, 620002 Yekaterinburg, Russian Federation;(2) Siberian Branch of the Russian Academy of Sciences, N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, 9 prosp. Akad. Lavrent"eva, 630090 Novosibirsk, Russian Federation |
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| Abstract: | 2-(Alkoxycarbonylmethylidene)-4-aryl-5-(dialkylamino)thiophen-3(2H)-ones were synthesized by condensation of N,N-(dialkyl)arylthioacetamides with dialkyl acetylenedicarboxylates. Intermediate substituted vinylic sulfides were isolated. When heated or in the presence of an acid or a base, they undergo cyclization into thiophenes. |
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| Keywords: | thiophene N N-(dialkyl)arylthioacetamides dialkyl acetylenedicarboxylates condensation |
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