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Reactions of 2-Ethoxymethyleneamino-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene with Nitrogen Nucleophiles

M. Potáček and H. Zornová

Department of Organic Chemistry, Faculty of Natural Sciences, Masaryk University, CS-611 37 Brno

 

Abstract: 2-Ethoxymethyleneamino-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene gave in the reaction with nitrogen nucleophiles corresponding formamidines that under heating cyclized to 3-substituted 4-imino-5,6,7,8-tetrahydrobenzo[b]thieno[2,3-d]-3,4-dihydropyrimidines. These under a base catalysis underwent Dimroth rearrangement to 4-substituted 5,6,7,8-tetrahydrobenzo[b]thieno[2,3-d]pyrimidines.

Full paper in Portable Document Format: 461a34.pdf

 

Chemical Papers 46 (1) 34–37 (1992)

Monday, July 26, 2021

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