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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Chemija / Chemistry (N003)
Author(s): Gefenas, Vladas;Stankevičiūtė, Živilė;Malinauskas, Albertas;Tumkevičius, Sigitas
Title: Regarding the intramolecular cyclization of ethyl (E)- 2-cyano-3-(S-methylisothioureido)- 2-propenoate
Is part of: Chemistry of heterocyclic compounds. , Vol. 46, iss. 3 (2010)
Extent: p. 363-366
Date: 2010
Keywords: Ethyl 4-amino-2-methylsulfanyl-5-pyrimidine carboxylate;Intramolecular cyclization;5-cyano-2-methylsulfanyl- 4(3H)-pyrimidinone;Ethyl (E)-2-cyano-3-(S-methylisothioureido)-2-propenoate;Ethyl (E)-2-cyano- 3-ethoxy-2-propenoate;Ethyl (E)- and (Z)-2-cyano-3-ureido-2-propenoates
Abstract: It is known that, depending on the substituent in the ureido fragment, the intramolecular cyclization of esters of 2-cyano-3-(S-alkylisothioureido)-2-propenooic acid in basic catalysis conditions occurs by two routes to form a mixture of the corresponding 2-alkylsulfanyl-5-cyano-4(3H)-pyrimidinone salts and ethyl 2-alkylsulfanyl-4-amino-5-pyrimidine carboxylates [1-4]. At the same time, from our data, the cyclization reaction of 3-(S-alkyl- isothioureido)-2-cyano-2-propenoates in acid conditions has hardly been studied
Affiliation(s): Chemijos institutas
Vilniaus pedagoginis universitetas
Vilniaus universitetas
Vytauto Didžiojo universitetas
Švietimo akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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