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1

Synthesis of methyl esters of 5-amino-4-(substituted amino)-2-methylthio-7H-pyrrolo[2,3d]-pyrimidine-6-carboxylic acids

S. Tumkevicius, A. Urbonas, P. Vainilavicius

Journal:

Chemistry of Heterocyclic Compounds

Year:

2000

Language:

english

File:

PDF, 363 KB

english, 2000

2

Palladium-catalyzed reaction of methyl 5-amino-4-chloro-2-methylthiopyrrolo[2,3-d]-pyrimidine-6-carboxylate with arylboronic acids. Synthesis of 1,3,4,6-tetraazadibenzo[cd,f]-azulene heterocyclic system

J. Dodonova, I. Uogintaite, V. Masevicius, S. Tumkevicius

Journal:

Chemistry of Heterocyclic Compounds

Year:

2010

Language:

english

File:

PDF, 286 KB

english, 2010

3

SYNTHESIS OF 4,6-DISUBSTITUTED THIENO[2,3-d]PYRIMIDINES FROM 4,6-DICHLORO-2-METHYLTHIOPYRIMIDINE-5-CARBALDEHYDE

Tumkevicius, S., Kaminskas, A., Bucinskaite, V, Labanauskas, L.

Journal:

Heterocyclic Communications

Year:

2003

Language:

english

File:

PDF, 1009 KB

english, 2003

4

Greener Paal-Knorr Pyrrole Synthesis by Mechanical Activation

Akelis, Liudvikas, Rousseau, Jolanta, Juskenas, Robertas, Dodonova, Jelena, Rousseau, Cyril, Menuel, Stéphane, Prevost, Dominique, Tumkevičius, Sigitas, Monflier, Eric, Hapiot, Frédéric

Journal:

European Journal of Organic Chemistry

Year:

2016

Language:

english

File:

PDF, 834 KB

english, 2016

5

ChemInform Abstract: Reaction of Esters of 2-Substituted 5-Pyrimidinecarboxylic Acids with Hydrazine Hydrate

S. Tumkevicius, V. Yakubkene, P. Vainilavicius

Journal:

Year:

2000

File:

PDF, 28 KB

2000

6

ChemInform Abstract: New Heterocyclic System, 1,3,5,6,8-Pentaazaacenaphthene.

S. Tumkevicius, V. Masyavicius

Journal:

Year:

2000

File:

PDF, 27 KB

2000

7

ChemInform Abstract: A Simple Synthesis of Novel 6,7,8,9-Tetrahydro-2-thia-3,5,6,9-tetraazabenz[cd]azulenes.

Sigitas Tumkevicius, Andrius Kaminskas, Jolanta Kulbokaite

Journal:

Year:

2000

File:

PDF, 27 KB

2000

8

ChemInform Abstract: A Facile Synthesis of Benzo[4,5]imidazo[2,1-b]pyrimido[5,4-f][1,3,4]thiadiazepines.

A. Brukstus, D. Melamedaite, S. Tumkevicius

Journal:

Year:

2001

File:

PDF, 29 KB

2001

9

ChemInform Abstract: Synthesis of Condensed Heterocycles Containing a Pyrimido[5,4-e][1,3]thiazine Fragment.

A. Brukshtus, S. Tumkevicius

Journal:

Year:

2001

File:

PDF, 29 KB

2001

10

ChemInform Abstract: Synthesis of Methyl Esters of 5-Amino-4-(substituted amino)-2-methylthio-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic Acids.

S. Tumkevicius, A. Urbonas, P. Vainilavicius

Journal:

Year:

2001

File:

PDF, 29 KB

2001

11

ChemInform Abstract: Synthesis of 5-(6-Methyl-2,4-dioxo-1,2,3,4-tetrahydro-3-pyrimidinyl) -methyl-4-amino-1,2,4-triazole-3-thione and Its Reactions with Polyfunctional Electrophiles.

Povilas Vainilavicius, Romualdas Smicius, Virginija Jakubkiene, Sigitas Tumkevicius

Journal:

Year:

2001

File:

PDF, 28 KB

2001

12

ChemInform Abstract: Synthesis of Carbocyclic Phosphononucleosides

B. Legeret, Z. Sarakauskaite, F. Pradaux, Y. Saito, S. Tumkevicius, L. A. Agrofoglio

Journal:

Year:

2001

File:

PDF, 24 KB

2001

13

ChemInform Abstract: Synthesis of a Novel Heterocyclic Ring System: 2-Thia-3,5,6,7,9-pentaazabenz[cd]azulenes.

Sigitas Tumkevicius, Luigi A. Agrofoglio, Andrius Kaminskas, Gintaras Urbelis, Thomas A. Zevaco, Olaf Walter

Journal:

Year:

2002

File:

PDF, 30 KB

2002

14

Synthesis of Isoxazolo[3,4-d]pyrimidines from 6-Chloropyrimidine-5-carbaldehydes.

A. Kaminskas, M. Dailide, S. Tumkevicius

Journal:

Year:

2002

File:

PDF, 30 KB

2002

15

5-(4,6-Diphenyl-2-pyrimidinyl)-1,3,4-oxa(thia)diazoles and 1,2,4-Triazoles.

Giedrute Mekuskiene, Sigitas Tumkevicius, Povilas Vainilavicius

Journal:

Year:

2002

File:

PDF, 29 KB

2002

16

Synthesis of a Novel Heterocyclic System: 2H-2,3,5,6,9-Pentaazabenz[cd]azulene.

S. Tumkevicius, Z. Sarakauskaite

Journal:

Year:

2003

File:

PDF, 101 KB

2003

17

The First Synthesis of Novel 7-Oxo-7H-pyrrolo[3,2-d]pyrimidine 5-Oxides from 1-(5-Nitro-6-pyrimidinyl)-2-arylacetylenes.

Inga Susvilo, Algirdas Brukstus, Sigitas Tumkevicius

Journal:

Year:

2003

File:

PDF, 84 KB

2003

18

Synthesis of Novel Thieno- and Pyrrolo[2,3-d]pyrimidines peri-Fused with Pyrimidine, 1,4-Diazepine and 1,4-Thiazepine Rings.

Sigitas Tumkevicius, Zivile Sarakauskaite, Viktoras Masevicius

Journal:

Year:

2003

File:

PDF, 152 KB

2003

19

Synthesis and Structure of Benzimidazo[1,2-c][1,2,3]thiadiazoles: First Examples of a Novel Ring System.

Sigitas Tumkevicius, Linas Labanauskas, Virginija Bucinskaite, Algirdas Brukstus, Gintaras Urbelis

Journal:

Year:

2003

File:

PDF, 130 KB

2003

20

Synthesis of 5-(2-Hydroxyethyl)-1-thia-3,5,6,8-tetraaza- and 1,3,5,6,8-Pentaazaacenaphthylenes.

S. Tumkevicius, Z. Sarakauskaite

Journal:

Year:

2004

File:

PDF, 133 KB

2004

21

Synthesis and Properties of Ethyl Esters of 4-Dialkylamino-2-methylthiothieno[2,3-d]pyrimidine-6-carboxylic Acids.

S. Tumkevicius, A. Kaminskas

Journal:

Year:

2004

File:

PDF, 118 KB

2004

22

Cyclization of 4-[Alkoxycarbonylmethylamino]- and 4-[Alkoxycarbonylmethylthio]-5-aminopyrrolo[2,3-d]pyrimidines to Give Azabenz[cd]azulenes.

S. Tumkevicius, V. Masevicius

Journal:

Year:

2004

File:

PDF, 79 KB

2004

23

Interaction of 7-Chloro-9-methylthio-3-phenylpyrimido[5,4-f][1,2,4]triazolo[3,4-b] [1,3,4]thiadiazepine with Some Nucleophiles.

A. Brukstus, I. Susvilo, S. Tumkevicius

Journal:

Year:

2004

File:

PDF, 108 KB

2004

24

Palladium-Catalyzed Coupling of 4-Halopyrrolo[2,3-d]pyrimidines with Arylacetylenes: Synthesis of a New Heterocyclic System — 4H-Pyrrolo[2,3,4-de]pyrimido[5′,4′:5,6][1,3]diazepino[1,7-a]indole (VIII).

Sigitas Tumkevicius, Viktoras Masevicius

Journal:

Year:

2005

File:

PDF, 30 KB

2005

25

Synthesis of 7-Oxopyrrolo-[3,2-d]pyrimidine 5-Oxides by the Rearrangement of 6-Alkynyl-5-nitropyrimidines.

S. Tumkevicius, I. Susvilo, A. Brukstus

Journal:

Year:

2005

File:

PDF, 15 KB

2005

26

Novel Method for Synthesis of Pyrido[4,3-d]pyrimidines.

I. Susvilo, R. Palskyte, S. Tumkevicius, A. Brukstus

Journal:

Year:

2006

File:

PDF, 17 KB

2006

27

ChemInform Abstract: Reaction of 2-Alkylthio-6-aminopyrimidin-4(3H)-ones with Ethyl Bromopyruvate. Synthesis of Furo[2,3-d]pyrimidine and Furo[3,2-e]imidazo[1,2-c]pyrimidine Carboxylates.

V. Masevicius, G. Petraityte, S. Tumkevicius

Journal:

Year:

2009

File:

PDF, 24 KB

2009

28

ChemInform Abstract: Palladium-Catalyzed Cross-Coupling Reaction of 2- and/or 5-Substituted 4,6-Dichloropyrimidines with Arylboronic Acids.

S. Tumkevicius, J. Dodonova, I. Baskirova, A. Voitechovicius

Journal:

Year:

2010

File:

PDF, 43 KB

2010

29

ChemInform Abstract: Synthesis of a Novel Heterocyclic System — Pyrimido[5′,4′:5,6]thiopyrano[2,3-b]indole.

Jurgis Sudzius, Sigitas Tumkevicius

Journal:

Year:

2010

File:

PDF, 26 KB

2010

30

ChemInform Abstract: Synthesis and Photophysical Properties of Oligoarylenes with a Pyrrolo[2,3-d]pyrimidine Core.

Sigitas Tumkevicius, Jelena Dodonova, Karolis Kazlauskas, Viktoras Masevicius, Lina Skardziute, Saulius Jursenas

Journal:

Year:

2010

File:

PDF, 36 KB

2010

31

ChemInform Abstract: Palladium-Catalyzed Reaction of Methyl 5-Amino-4-chloro-2-methylthiopyrrolo[2,3-d]pyrimidine-6-carboxylate with Arylboronic Acids. Synthesis of 1,3,4,6-Tetraazadibenzo[cd,f]azulene Heterocyclic System.

J. Dodonova, I. Uogintaite, V. Masevicius, S. Tumkevicius

Journal:

Year:

2011

File:

PDF, 27 KB

2011

32

ChemInform Abstract: Pyrrolo[2,3-d]pyrimidine-Core-Extended π-Systems: Synthesis of 2,4,7-Triarylpyrrolo[2,3-d]pyrimidines.

Sigitas Tumkevicius, Jelena Dodonova

Journal:

Year:

2011

File:

PDF, 42 KB

2011

33

Palladium-catalyzed cross-coupling reaction of 2- and/or 5-substituted 4,6-dichloropyrimidines with arylboronic acids

S. Tumkevicius, J. Dodonova, I. Baskirova, A. Voitechovicius

Journal:

Journal of Heterocyclic Chemistry

Year:

2009

Language:

english

File:

PDF, 85 KB

english, 2009

34

Synthesis of N-aryl-2-amino-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxamides

S. Tumkevicius, M. Dailide

Journal:

Journal of Heterocyclic Chemistry

Year:

2005

Language:

english

File:

PDF, 155 KB

english, 2005

35

Study on the reaction of methyl N-Methyl-N-(6-substituted-5-nitropyrimidin-4-yl)glycinates with sodium alkoxides

Inga Susvilo, Algirdas Brukstus, Sigitas Tumkevicius

Journal:

Journal of Heterocyclic Chemistry

Year:

2006

Language:

english

File:

PDF, 845 KB

english, 2006

36

Synthesis of 2,4-diaminothieno- and pyrrolo[2,3-d]pyrimidine-6-carboxylic acid derivatives

S. Tumkevicius, M. Dailide, A. Kaminskas

Journal:

Journal of Heterocyclic Chemistry

Year:

2006

Language:

english

File:

PDF, 268 KB

english, 2006

37

A facile synthesis of 5H-1-thia-3,5,6,8-tetraazaacenaphthylenes

Sigitas Tumkevičius

Journal:

European Journal of Organic Chemistry

Year:

1995

Language:

english

File:

PDF, 303 KB

english, 1995

38

Development of methylthiomethyl (MTM) protection for N1 of pyrrolo[2,3-d]pyrimidin-2,4-diones

Eric D. Edstrom, Xianqi Feng, Sigitas Tumkevicius

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 212 KB

english, 1996

39

4-[N-(Substituted 4-pyrimidinyl)amino]benzenesulfonamides as inhibitors of carbonic anhydrase isozymes I, II, VII, and XIII

Jurgis Sūdžius, Lina Baranauskienė, Dmitrij Golovenko, Jurgita Matulienė, Vilma Michailovienė, Jolanta Torresan, Jelena Jachno, Rasa Sukackaitė, Elena Manakova, Saulius Gražulis, Sigitas Tumkevičius,

Journal:

Bioorganic & Medicinal Chemistry

Year:

2010

Language:

english

File:

PDF, 1.04 MB

english, 2010

40

Study on the reactions of 4-amino-5-nitro-6-phenylethynylpyrimidines with amines and thiols

Inga Cikotiene, Erika Pudziuvelyte, Algirdas Brukstus, Sigitas Tumkevicius

Journal:

Year:

2007

Language:

english

File:

PDF, 279 KB

english, 2007

41

Transformation of methyl N-methyl-N-(6-substituted-5-nitro-4-pyrimidinyl)aminoacetates into 4-methylamino-5-nitrosopyrimidines and 9-methylpurin-8-ones

Inga Susvilo, Algirdas Brukstus, Sigitas Tumkevicius

Journal:

Tetrahedron Letters

Year:

2005

Language:

english

File:

PDF, 120 KB

english, 2005

42

Synthesis and photophysical properties of oligoarylenes with a pyrrolo[2,3-d]pyrimidine core

Sigitas Tumkevicius, Jelena Dodonova, Karolis Kazlauskas, Viktoras Masevicius, Lina Skardziute, Saulius Jursenas

Journal:

Tetrahedron Letters

Year:

2010

Language:

english

File:

PDF, 847 KB

english, 2010

43

Synthesis of a novel heterocyclic ring system: 2-thia-3,5,6,7,9-pentaazabenz[cd]azulenes

Sigitas Tumkevicius, Luigi A Agrofoglio, Andrius Kaminskas, Gintaras Urbelis, Thomas A Zevaco, Olaf Walter

Journal:

Tetrahedron Letters

Year:

2002

Language:

english

File:

PDF, 116 KB

english, 2002

44

Synthesis and structure of benzimidazo[1,2-c][1,2,3]thiadiazoles: first examples of a novel ring system

Sigitas Tumkevicius, Linas Labanauskas, Virginija Bucinskaite, Algirdas Brukstus, Gintaras Urbelis

Journal:

Tetrahedron Letters

Year:

2003

Language:

english

File:

PDF, 159 KB

english, 2003

45

Reaction of ethyl N-(6-ethoxycarbonyl-2-methylthiothieno[2,3-d]-pyrimidin-5-yl) formimidate with alkyl- and arylhydrazines: Formation of modified thieno[2,3-d]pyrimidines and thieno[2,3-d:4,5-d]dipyrimidin-4-ones

Dr. S. Tumkevicius

Journal:

Advanced Synthesis & Catalysis

Year:

1994

Language:

english

File:

PDF, 296 KB

english, 1994

46

Hall effect and acoustoelectric phenomena in PbTe films

B.-P. Kietis, R. Reksnys, K. Tumkevičius

Journal:

physica status solidi (a)

Year:

1983

Language:

english

File:

PDF, 186 KB

english, 1983

47

A Mechanism of Current Percolation in a Heterogeneous Layer of PbTe

M. P. Mikalkevičius, K. K. Tumkevičius

Journal:

physica status solidi (a)

Year:

1984

Language:

english

File:

PDF, 158 KB

english, 1984

48

Reaction of esters of 2-substituted 5-pyrimidinecarboxylic acids with hydrazine hydrate

S. Tumkevicius, V. Yakubkene, P. Vainilavicius

Journal:

Chemistry of Heterocyclic Compounds

Year:

1999

Language:

english

File:

PDF, 205 KB

english, 1999

49

New heterocyclic system, 1,3,5,6,8-pentaazaacenaphthene

S. Tumkevicius, V. Masyavicius

Journal:

Chemistry of Heterocyclic Compounds

Year:

1999

Language:

english

File:

PDF, 72 KB

english, 1999

50

Synthesis of condensed heterocycles containing a pyrimido[5,4-e][1,3]-thiazine fragment

A. Brukshtus, S. Tumkevicius

Journal:

Chemistry of Heterocyclic Compounds

Year:

2000

Language:

english

File:

PDF, 184 KB

english, 2000

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