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Autor: D. E. Sile, G. F. Rozental, Edmunds Lukevics, V. Slavinska, J. Popelis, Yu. Balodis

Publikováno v: Chemistry of Heterocyclic Compounds. 38:287-291

We have developed a method for the synthesis of ethyl 4-(3-pyridyl)- and 4-(4-pyridyl)-2-oxobutenoates by condensation of 3-pyridinecarbaldehyde and 4-pyridinecarbaldehyde monohydrate respectively with ethyl pyruvate, esterifiction of the target acid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc55d26e1dd8f97a6be1afa96c3cbb4b
https://doi.org/10.1023/a:1015679118975

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Autor: G. Rozentals, J. Popelis, Yu. Balodis, V. Slavinska, D. E. Sile, Edmunds Lukevics

Publikováno v: Chemistry of Heterocyclic Compounds. 38:801-804

We have studied the hydrogenation of the sodium salt of 2-oxo-4-(3-pyridyl)butenoic acid on palladium black in the temperature range 20-70°C in aqueous-alcohol medium. The products of the reaction are the sodium salts of 2-oxo-4-(3-pyridyl)butanoic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd4cf7c6c0bf9d028a69059afea85436
https://doi.org/10.1023/a:1020677503143

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Hydrogenation of derivatives of 2-oxo-4-(2-thienyl)butenoic acid at palladium and nickel catalysts

Autor: I. V. Turovskis, V. A. Slavinskaya, E. Kh. Korchagova, Edmunds Lukevics, D. E. Sile, Yu. Balodis, G. F. Rozental, S. Kh. Grinberga, N. G. Panchenko

Publikováno v: Chemistry of Heterocyclic Compounds. 34:1127-1131

The hydrogenation of sodium and ethyl 2-oxo-4-(2-thienyl)butenoate at Raney nickel and palladium black was investigated. With Raney nickel the reaction products were the corresponding derivatives of 2-oxo-4-(2-thienyl)butyric acid and 2-hydroxy-4-(2-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2ac81f576a88e6bdf78dd62f90e194f
https://doi.org/10.1007/bf02319489

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Hydrogenation of 4-(2-furyl)-2-oxobutenoic acid sodium salt on Raney nickel

Autor: E. Kh. Korchagova, N. G. Panchenko, M. Yu. Katkevich, I. U. Lipsbergs, V. A. Slavinskaya, D. E. Sile, Edmunds Lukevics

Publikováno v: Chemistry of Heterocyclic Compounds. 34:35-39

The hydrogenation of 4-(2-furyl)-2-oxobutenoic acid sodium salt on a nickel catalyst has been studied. Using Raney nickel catalyst, the corresponding salts of 4-(2-furyl)-2-oxobutanoic acid, 4-(2-furtyl)-2-hydroxybutanoic acid, and aliphatic hydrogen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5cabc18768310a6d5307731aa7c49c60
https://doi.org/10.1007/bf02290609

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New Way for the Preparation of 4-Phenyl-2-oxobutyric Acid Ethyl Ester

Autor: E. Korchagova, V. Slavinska, D. E. Sile, Edmunds Lukevics, M. Katkevich

Publikováno v: Synthetic Communications. 26:2229-2233

New way for the preparation of 4-phenyl-2-oxobutyric acid ethyl ester 1 has been elaborated. The four-steps synthesis from ethyl pyruvate involves the consecutive condensation of ethyl pyruvate with benzaldehyde, hydrogenation of benzylidenepyruvic a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::740518a3d2c93973bc60b0ff7564272c
https://doi.org/10.1080/00397919608003583

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Synthesis of several heteryldehydropeptides by the oxazolone method

Autor: I. U. Lipsbergs, E. Kh. Korchagova, M. Katkevich, V. A. Slavinskaya, I. V. Turovskii, D. E. Sile, E. Lukevits

Publikováno v: Chemistry of Heterocyclic Compounds. 31:202-205

(E)-N-Benzolydehydro-3-(3-pyridyl)-alanyltryptophan was synthesized in 89% yield by the reaction of 2-phenyl-4-(3-pyridylidene)-5(4H)-oxazolone with tryptophan. The reaction of 4-[1-(2-furyliden)ethyl]- and 4-(3-pyridyliden)2-phenyl-5(4H)-oxazolones

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72bc699263df02812807706563b51a68
https://doi.org/10.1007/bf01169680

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Synthesis of?-substituted?-amino acids by the alkylation of 5-oxazolinone derivatives

Autor: D. E. Sile, M. Yu. Katkevich, E. Lukevits, E. Kh. Korchagova, V. A. Slavinskaya

Publikováno v: Chemistry of Heterocyclic Compounds. 30:724-728

Methods have been developed for the alkylation of 5-oxazolinone derivatives in DMF in the presence of K2CO3, KOH, or diisopropylethylamine and a phase transfer catalyst as well as for the preparation ofα-methyl-phenylalanine,α-methylalanine,α-meth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7e1669e879db9259fa04877a3684a34
https://doi.org/10.1007/bf01166316

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