Author

S. P. Tumkyavichyus

Observed names: S. P. TUMKYAVICHYUS, S. TUMKYAVICHYUS, S. TUMKYAVICIUS, S. Tumkyavichius, S. Tumkyavichyus, S. Tumkyavicius, С. Тумкявичюс

Institution: Vilnius University

Observed institution: Vilnius University

OpenAlex ID: A5081681596

Synthesis of 3,4-Dihydro-5H-1-Thia-3,5,6,8-tetraazaacenaphthylenes

1996 · S. Tumkyavichyus · Chemistry of Heterocyclic Compounds · 11

A new heterocyclic system 4-thia-1,3,7a, 9-tetraazacyclopenta[def]phenanthrene

1998 · S. Tumkyavicius, R. Bernotaite · Chemistry of Heterocyclic Compounds · 4

5H-benzimidazo[2?, 1?:2,3][1,3]thiazino[6,5-d]-pyrimidine and benzimidazo[2,1-b]pyrimido[5,4-f] [1,3,4]thiadazepine. novel heterocyclic systems

1996 · A. Brukshtus, T. Sadauskas, et al. · Chemistry of Heterocyclic Compounds · 4

Synthesis of 3,4-diamino-1H-pyrazolo[3,4-d]pyrimidines

1996 · S. Tumkyavichyus · Chemistry of Heterocyclic Compounds · 3

Reaction of Esters of 2-substituted 5-pyrimidinecarboxylic Acids With Hydrazine Hydrate

2013 · С. Тумкявичюс, B. Якyбкене, et al. · Chemistry of Heterocyclic Compounds · 1

Synthesis of substituted 5-aminothieno[2,3d] pyrimidines

1995 · S. Tumkyavichius · Chemistry of Heterocyclic Compounds · 1

Reaction of 6-cyano-1,2,4-triazolo[1,5-a]pyrimidin-5(8H)-one with phosphorus oxychloride in the presence of N,N-diethylaniline

1991 · S. Tumkyavichyus, Yu. Mitskene · Chemistry of Heterocyclic Compounds · 1

Regarding the Intramolecular Cyclization of Ethyl ( E )-2-cyano-3-(s-methylisothioureido)-2-propenoate

2015 · Vladas Gefenas, Ж. Станкявичюте, et al. · Chemistry of Heterocyclic Compounds

ChemInform Abstract: A New Heterocyclic System — 4‐Thia‐1,3,7a,9‐tetraazacyclopenta[def]phenanthrene

1999 · S. Tumkyavichius, R. Bernotaite · ChemInform

ChemInform Abstract: 5H‐Benzimidazo(2′,1′:2,3)(1,3)thiazino(6,5‐d)pyrimidine and Benzimidazo(2,1‐b)pyrimido(5,4‐f)(1,3,4)thiadiazepine ‐ Novel Heterocyclic Systems

1996 · A. BRUKSHTUS, T. SADAUSKAS, et al. · ChemInform

ChemInform Abstract: Synthesis of 3,4‐Dihydro‐5H‐1‐thia‐3,5,6,8‐tetraazaacenaphthylenes.

1996 · S. TUMKYAVICIUS · ChemInform

ChemInform Abstract: Synthesis of Some Substituted 5‐Aminothieno(2,3‐d)pyrimidines.

1996 · S. TUMKYAVICHYUS · ChemInform

ChemInform Abstract: Synthesis of 7‐Substituted 3‐Aminothieno(2,3‐d;4,5‐d′)dipyrimidine‐4(3H)‐ones.

1989 · S. P. TUMKYAVICHYUS · ChemInform

Synthesis of 7-substituted 3-aminothieno[2,3-d:4,5-d?]-dipyrimidin-4(3H)-ones

1988 · S. P. Tumkyavichyus · Chemistry of Heterocyclic Compounds

ChemInform Abstract: Synthesis of N‐(4‐Chloro‐5‐cyanopyrimidin‐2‐yl)aminoacetic Acid Ethyl Ester.

1988 · S. P. TUMKYAVICHYUS, YU. P. KARMALAVICHYUTE · ChemInform

Synthesis of ethyl ester of N-(4-chloro-5-cyano-2-pyrimidinyl)-aminoacetic acid

1988 · S. P. Tumkyavichyus, Yu. P. Karmalavichyute · Chemistry of Heterocyclic Compounds

ChemInform Abstract: Synthesis of 5‐Amino Derivatives of 2‐Methylthiothieno(2,3‐d)pyrimidinecarboxylic Acid Ethyl Ester and Their Reactions with Hydrazine.

1988 · S. P. TUMKYAVICHYUS, R. I. MATULYAUSKENE · ChemInform

Synthesis of 5-amino derivatives of ethyl 2-methylthiothieno-[2,3-d]pyrimidine-6-carboxylate and their reaction with hydrazine

1987 · S. P. Tumkyavichyus, R. I. Matulyauskene · Chemistry of Heterocyclic Compounds

ChemInform Abstract: Synthesis of 6‐Dialkylamino‐2‐(ethoxycarbonyl)methylthio‐4‐pyrimidinecarboxylic Acid Methyl Esters.

1986 · S. P. TUMKYAVICHYUS, P. I. VAINILAVICHYUS · ChemInform

Synthesis of methyl esters of 6-dialkylamino-2-(carbethoxy)-methylthiopyrimidine-4-carboxylic acids

1986 · S. P. Tumkyavichyus, P. I. Vainilavichyus · Chemistry of Heterocyclic Compounds

Synthesis and pharmacological examination of some (6-dialkylaminopyrimidin-4-ylthio)acetic acids

1984 · P. I. Vainilabichus, S. P. Tumkyavichyus, et al. · Pharmaceutical Chemistry Journal

Works count: 21

Citation count: 25

H-index: 3

I10-index: 1