G. Stájer

2014

Retro Diels-Alder Reactions

Csende, F., Stájer, G. & Fülöp, F., Feb 2014, Comprehensive Organic Synthesis: Second Edition. Elsevier Ltd., Vol. 5. p. 518-594 77 p.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Fullerenes

Carbon Nanotubes

Alkenes

Organic compounds

Olefins

2012

11 Citations (Scopus)

Recent developments in the synthesis of heterocycle-fused isoindoles

Csende, F., Miklós, F. & Stájer, G., Apr 2012, In : Current Organic Chemistry. 16, 8, p. 1005-1050 46 p.

Research output: Contribution to journal › Article

Isoindoles

Derivatives

2011

3 Citations (Scopus)

1-oxo-1,3-dithiolanes-synthesis and stereochemistry

Pihlaja, K., Sinkkonen, J., Stájer, G., Koch, A. & Kleinpeter, E., Jul 2011, In : Magnetic Resonance in Chemistry. 49, 7, p. 443-449 7 p.

Research output: Contribution to journal › Article

Thin layer chromatography

Stereochemistry

Molecular modeling

Chemical shift

Computational methods

2009

3 Citations (Scopus)

Preparation and structures of isoindolone- or pyrimidone-condensed heterocycles containing a hydroxy group on a cyclohexane or norbornane moiety

Miklós, F., Sohár, P., Csámpai, A., Sillanpää, R. & Stájer, G., Apr 2009, In : Letters in Organic Chemistry. 6, 3, p. 252-257 6 p.

Research output: Contribution to journal › Article

Norbornanes

Pyrimidinones

Lactones

Thiazepines

Isoindoles

2008

4 Citations (Scopus)

3-Oxo-1,3-oxathiolanes-synthesis and stereochemistry

Pihlaja, K., Sinkkonen, J. & Stájer, G., Mar 2008, In : Magnetic Resonance in Chemistry. 46, 3, p. 244-249 6 p.

Research output: Contribution to journal › Article

Stereochemistry

stereochemistry

seats

Conformations

thin layer chromatography

15 Citations (Scopus)

Chemistry of norbornane/ene and heteronorbornane/ene β-amino acids

Csende, F., Fülöp, F. & Stájer, G., May 2008, In : Current Organic Synthesis. 5, 2, p. 173-185 13 p.

Research output: Contribution to journal › Article

Norbornanes

Oligopeptides

Alanine

Derivatives

Amino Acids

2007

7 Citations (Scopus)

Diastereochemical Differentiation of β-Amino Acids Using Host-Guest Complexes Studied by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

Hyyryläinen, A. R. M., Pakarinen, J. M. H., Vainiotalo, P., Stájer, G. & Fülöp, F., Jun 2007, In : Journal of the American Society for Mass Spectrometry. 18, 6, p. 1038-1045 8 p.

Research output: Contribution to journal › Article

Cyclotrons

Cyclotron resonance

Fourier Analysis

Mass spectrometry

Mass Spectrometry

6 Citations (Scopus)

Does the electron ionization induced fragmentation of partly saturated stereoisomeric pyrrolo-and isoindoloquinazolinones show stereospecificity?

Pihlaja, K., Martiskainen, O. & Stájer, G., 2007, In : Rapid Communications in Mass Spectrometry. 21, 5, p. 653-660 8 p.

Research output: Contribution to journal › Article

Ionization

Ions

Electrons

Stereoisomerism

Amides

1 Citation (Scopus)

Preparation and structure of bicycloalkane-condensed aryldiaziridines accompanied by pyrimidines

Sohár, P., Csámpai, A., Sillanpää, R., Fülöp, F. & Stájer, G., Jun 1 2007, In : Heterocycles. 71, 6, p. 1315-1326 12 p.

Research output: Contribution to journal › Article

Bromosuccinimide

Pyrimidines

Methylene Chloride

X Ray Crystallography

Chromatography

4 Citations (Scopus)

Preparation and structure of pyrrolo[2,1-b]- and isoindolo[1,2-b][3,1]epoxyquinazolines

Kanizsai, I., Miklós, F., Sohár, P., Csámpai, A., Sillanpää, R. & Stájer, G., Apr 17 2007, In : Journal of Molecular Structure. 831, 1-3, p. 37-45 9 p.

Research output: Contribution to journal › Article

Cyclopentanes

NSC 153174

preparation

acids

Acids

2006

20 Citations (Scopus)

A retro Diels-Alder method for the preparation of pyrrolo[1,2-a] pyrimidinediones from diexo-aminooxanorbornenecarboxamide

Stájer, G., Szabó, A. E., Sohár, P., Csámpai, A. & Sillanpää, R., Feb 20 2006, In : Journal of Molecular Structure. 784, 1-3, p. 239-243 5 p.

Research output: Contribution to journal › Article

preparation

acids

Acids

Thermolysis

Cyclization

11 Citations (Scopus)

Preparation of heterocycles by microwave-induced retro Diels-Alder reaction

Miklós, F., Stájer, G. & Fülöp, F., Dec 2006, In : Letters in Organic Chemistry. 3, 12, p. 915-916 2 p.

Research output: Contribution to journal › Article

Pyrimidinones

Microwave heating

Cycloaddition Reaction

Microwaves

Heating

2005

31 Citations (Scopus)

Advanced methods for the synthesis of 3-substituted 1H-isoindol-1-ones

Stájer, G. & Csende, F., Sep 2005, In : Current Organic Chemistry. 9, 13, p. 1277-1286 10 p.

Research output: Contribution to journal › Article

Phthalimides

Keto Acids

Carbonyl compounds

Acids

Isoindol-1-one

19 Citations (Scopus)

Approaches to the formation of condensed isoindolones

Csende, F. & Stájer, G., Sep 2005, In : Current Organic Chemistry. 9, 13, p. 1261-1276 16 p.

Research output: Contribution to journal › Article

Phthalimides

Keto Acids

Cyclization

Isomers

Amines

3 Citations (Scopus)

Indoloquinolines, indolobenzoxazines and quinazolophthalazines prepared from norbornane/eneamino acids and hydrazides

Stájer, G., Szabó, A. E., Túrós, G., Sohár, P. & Sillanpää, R., Sep 26 2005, In : European Journal of Organic Chemistry. 19, p. 4154-4161 8 p.

Research output: Contribution to journal › Article

Norbornanes

Acetates

Acids

X ray crystallography

X Ray Crystallography

16 Citations (Scopus)

Versatile reactivity and catalytic effects of copper(II) halides in organic syntheses

Csende, F. & Stájer, G., Nov 2005, In : Current Organic Chemistry. 9, 17, p. 1737-1755 19 p.

Research output: Contribution to journal › Article

Nitriles

Cyclization

Copper

Pyridazines

Salts

2004

20 Citations (Scopus)

Application of furan as a diene: Preparation of condensed 1,3-oxazines by retro-Diels-Alder reactions

Stájer, G., Miklós, F., Kanizsai, I., Csende, F., Sillanpää, R. & Sohár, P., Aug 27 2004, In : European Journal of Organic Chemistry. 17, p. 3701-3706 6 p.

Research output: Contribution to journal › Article

Oxazines

Cycloaddition Reaction

NSC 153174

Keto Acids

Benzoic Acid

Oxigén- és nitrogéntartalmú mono- és policiklusos vegyületek eloállítása

Translated title of the contribution: Preparation of mono- and polyheterocycles containing oxygen and nitrogen atomsStájer, G., Mar 2004, In : Magyar Kemiai Folyoirat, Kemiai Kozlemenyek. 109-110, 1, p. 6-15 10 p.

Research output: Contribution to journal › Article

Nitrogen

Oxygen

Atoms

Acids

Pyrimidinones

7 Citations (Scopus)

Preparation and structure of di-exo-condensed norbornane heterocycles

Miklós, F., Hetényi, A., Sohár, P. & Stájer, G., Jul 2004, In : Monatshefte fur Chemie. 135, 7, p. 839-847 9 p.

Research output: Contribution to journal › Article

hydrazine

Norbornanes

Amino Alcohols

Nucleophiles

Cyclization

15 Citations (Scopus)

Preparation and structure of diexo-oxanorbornane-fused 1,3-heterocycles

Miklós, F., Kanizsai, I., Thomas, S., Kleinpeter, E., Sillanpää, R. & Stájer, G., Jan 1 2004, In : Heterocycles. 63, 1, p. 63-74 12 p.

Research output: Contribution to journal › Article

Oxazines

Oxazoles

Alkanolamines

Cross-Linking Reagents

Cyclopentanes

14 Citations (Scopus)

Preparation and structure of pyrrolo- and isoindoloquinazolinones

Sohár, P., Csámpai, A., Szabó, A. E. & Stájer, G., Jun 2004, In : Journal of Molecular Structure. 694, 1-3, p. 139-147 9 p.

Research output: Contribution to journal › Article

preparation

acids

Acids

Norbornanes

Derivatives

8 Citations (Scopus)

Reactions of levulinic acid with norbornane/ene amino acids and diamines

Stájer, G., Szabó, A. E., Csámpai, A. & Sohár, P., Mar 12 2004, In : European Journal of Organic Chemistry. 6, p. 1318-1322 5 p.

Research output: Contribution to journal › Article

Norbornanes

Heptanes

Diamines

Carboxylic Acids

Benzoxazines

5 Citations (Scopus)

Synthesis and stereostructure of saturated isoindolone-fused hetero tri-, tetra-, and pentacyclic compounds

Sohár, P., Csámpai, A., Magyarfalvi, G., Szabó, A. E. & Stájer, G., Dec 2004, In : Monatshefte fur Chemie. 135, 12, p. 1519-1527 9 p.

Research output: Contribution to journal › Article

Norbornanes

ethylenediamine

hydrazine

Acids

Isoindoles

Synthesis and structure of cycloalkane- and norbornane-condensed 6-aryl-1,2,4,5-tetrahydropyridazinones

Csende, F., Hetényi, A., Stájer, G. & Fülöp, F., Mar 2004, In : Journal of Heterocyclic Chemistry. 41, 2, p. 259-261 3 p.

Research output: Contribution to journal › Article

Norbornanes

Cycloparaffins

Hydrogen

Molecular modeling

Derivatives

2003

3 Citations (Scopus)

Stereospecific fragmentations in the mass spectra of stereoisomeric isoindoloquinazolines

Ovcharenko, V. V., Pihlaja, K. & Stájer, G., Sep 2003, In : Journal of the American Society for Mass Spectrometry. 14, 9, p. 1049-1056 8 p.

Research output: Contribution to journal › Article

Ionization

Mass Behavior

Electrons

Stereoisomerism

Isomers

3 Citations (Scopus)

Structures of saturated 5H-Pyrrolo[1,2-a][3,1]benzoxazin-1(2H)-ones prepared from 4-oxopentanoic acid and cyclic amino alcohols

Kivelä, H., Klika, K. D., Szabó, A., Stájer, G. & Pihlaja, K., May 2003, In : European Journal of Organic Chemistry. 10, p. 1879-1886 8 p.

Research output: Contribution to journal › Article

Cyclohexylamines

Amino Alcohols

Stereoselectivity

Charcoal

Nuclear magnetic resonance

28 Citations (Scopus)

The retro Diels-Alder reaction as a valuable tool for the synthesis of heterocycles

Stájer, G., Csende, F. & Fülöp, F., Sep 2003, In : Current Organic Chemistry. 7, 14, p. 1423-1432 10 p.

Research output: Contribution to journal › Article

Pyrimidinones

Oxazoles

Pyrazoles

Imidazoles

Derivatives

2002

11 Citations (Scopus)

¹H, ¹³C, and ¹⁵N NMR stereochemical study of cis-fused 7a(8a)-methyl and 6-phenyl octa(hexa)hydrocyclopenta[d][1,3]oxazines and [3,1]benzoxazines

Tähtinen, P., Sinkkonen, J., Klika, K. D., Nieminen, V., Stájer, G., Szakonyi, Z., Fülöp, F. & Pihlaja, K., 2002, In : Chirality. 14, 2-3, p. 187-198 12 p.

Research output: Contribution to journal › Article

Benzoxazines

Oxazines

Nuclear magnetic resonance

Conformations

Derivatives

6 Citations (Scopus)

Application of t-2-benzoyl-t-5-phenylcyclohexane-r-1-carboxylic acid for the preparation of saturated isoindole-fused heterocycles

Stájer, G., Szabó, A. E., Csende, F., Argay, G. & Sohár, P., 2002, In : Journal of the Chemical Society, Perkin Transactions 2. 3, p. 657-662 6 p.

Research output: Contribution to journal › Article

Norbornanes

Isoindoles

Carboxylic Acids

Benzoxazines

Derivatives

11 Citations (Scopus)

Isomerization and application of aroylnorbornene-carboxylic acids for stereoselective preparation of heterocycles

Miklós, F., Sohár, P., Csámpai, A., Sillanpää, R., Péter, M. & Stájer, G., Dec 1 2002, In : Heterocycles. 57, 12, p. 2309-2320 12 p.

Research output: Contribution to journal › Article

Isomerization

Carboxylic Acids

Heptanes

Cross-Linking Reagents

Putrescine

3 Citations (Scopus)

Methods for preparation of γ- and δ-oxo acids as useful synthons for heterocycles

Csende, F. & Stájer, G., Jul 1 2002, In : Heterocycles. 57, 7, p. 1353-1365 13 p.

Research output: Contribution to journal › Article

Keto Acids

Cycloparaffins

Regioselectivity

7 Citations (Scopus)

Preparation and structure of pyrazolo[3,4-d]pyrimidinones

Miklós, F., Kanizsai, I., Sohár, P. & Stájer, G., Jun 3 2002, In : Journal of Molecular Structure. 610, 1-3, p. 41-46 6 p.

Research output: Contribution to journal › Article

pyrazolo(3,4-d)pyrimidine

Pyrimidinones

Acylation

Cyclization

Amines

3 Citations (Scopus)

Preparation of hydroxy-substituted hexahydrophthalazinones from cyclohexane- and norbornanelactones or ketallactones

Szabó, J. A., Sohár, P., Csámpai, A. & Stájer, G., 2002, In : Monatshefte fur Chemie. 133, 3, p. 241-248 8 p.

Research output: Contribution to journal › Article

hydrazine

Cyclization

Nuclear magnetic resonance spectroscopy

Atoms

Cyclohexane

2001

Kémiai kalandozások: Színreakciók, cikloaddíciók és cikloreverziók

Translated title of the contribution: Challenges in chemistry; colour reactions, cycloadditions and cycloreversionsStájer, G., 2001, In : Acta Pharmaceutica Hungarica. 71, 2, p. 143-151 9 p.

Research output: Contribution to journal › Article

Cycloaddition Reaction

Norbornanes

Color

Cross-Linking Reagents

Oxadiazoles

8 Citations (Scopus)

Mass-spectrometric differentiation of diexo- and diendo-fused isomers of norbornane/ene-condensed 2-thiouracil and 1,3-thiazino[3,2-a]pyrimidine derivatives: Stereoselectivity of retro-diels-alder fragmentations under EI and CI conditions

Ovcharenko, V. V., Shaikhutdinov, R. A., Pihlaja, K. & Stájer, G., 2001, In : Journal of the American Society for Mass Spectrometry. 12, 9, p. 1011-1019 9 p.

Research output: Contribution to journal › Article

Norbornanes

Thiouracil

Stereoselectivity

Butanes

Isomers

11 Citations (Scopus)

Preparation of 9-amino-1,9-diazatricyclo[6.4.0.0^4,8]dodecane-2,10-dione by a retro-Diels-Alder reaction

Stájer, G., Miklós, F., Sohár, P. & Sillanpää, R., Nov 2001, In : European Journal of Organic Chemistry. 21, p. 4153-4156 4 p.

Research output: Contribution to journal › Article

Cycloaddition Reaction

Cyclopentanes

Lactams

Heating

Acetates

21 Citations (Scopus)

Preparation of pyrimido[2,1-a]phthalazines and an aminopyrimido[2,1-a]isoindole by retro Diels-Alder reaction

Sohár, P., Miklós, F., Csámpai, A. & Stájer, G., Mar 7 2001, In : Journal of the Chemical Society, Perkin Transactions 1. 5, p. 558-564 7 p.

Research output: Contribution to journal › Article

Phthalazines

Isoindoles

Quinazolinones

Cycloparaffins

Cyclopentanes

16 Citations (Scopus)

Theoretical and experimental studies on ring closure reactions of 4(5)-chloro-5(4)-hydroxyalkylamino-6-nitro-3 (2H)-pyridazinones

Éliás, O., Károlyházy, L., Stájer, G., Fülöp, F., Czakó, K., Harmath, V., Barabás, O., Keseru, K. & Mátyus, P., Jul 9 2001, In : Journal of Molecular Structure: THEOCHEM. 545, p. 75-96 22 p.

Research output: Contribution to journal › Article

Oxazepines

Cyclization

closures

Theoretical Models

Derivatives

2000

18 Citations (Scopus)

4- and 5-oxocarboxylic acids as versatile synthons for the preparation of heterocycles

Csende, F. & Stájer, G., Jun 1 2000, In : Heterocycles. 53, 6, p. 1379-1419 41 p.

Research output: Contribution to journal › Article

Acids

9 Citations (Scopus)

A retro Diels-Alder synthetic method. Fused-skeleton isoindolones and further saturated hetero polycycles

Bernáth, G., Stájer, G., Fulop, F. & Sohár, P., 2000, In : Journal of Heterocyclic Chemistry. 37, 3, p. 439-449 11 p.

Research output: Contribution to journal › Article

20 Citations (Scopus)

Double retro Diels-Alder reaction applied for preparation of a pyrimido[1,2-b]pyridazine

Miklós, F., Stájer, G., Sohár, P. & Böcskei, Z., 2000, In : Synlett. 1, p. 67-68 2 p.

Research output: Contribution to journal › Article

Cyclopentanes

Toluene

Boiling liquids

Condensation

Heating

8 Citations (Scopus)

The assignment of the correct structures and conformational analysis of the isomeric t-5- and t-4-phenyl-t(c)-2-benzoyl-r-1-cyclohexanecarboxylic acids by NMR and FT-IR spectroscopy

Klika, K. D., Tähtinen, P., Dahlqvist, M., Szabó, J. A., Stájer, G., Sinkkonen, J. & Pihlaja, K., Apr 2000, In : Journal of the Chemical Society, Perkin Transactions 2. 4, p. 687-692 6 p.

Research output: Contribution to journal › Article

Cyclohexanecarboxylic Acids

Isomers

Hydrogen

Infrared spectroscopy

Nuclear magnetic resonance

1999

A convenient reduction of unsaturated bicyclic anhydrides

Csende, F. & Stájer, G., 1999, In : Organic Preparations and Procedures International. 31, 2, p. 220-222 3 p.

Research output: Contribution to journal › Article

Anhydrides

8 Citations (Scopus)

Energy-resolved electrospray mass spectrometry of diexo-norbornane and norbornene derivatives containing a fused, phenyl-substitute, 1,3-oxazine ring: Competitive retro-Diels-Alder fragmentation processes

Lemaire, D., Serani, L., Laprévote, O., Ovcharenko, V., Pihlaja, K. & Stájer, G., 1999, In : European Journal of Mass Spectrometry. 5, 4, p. 253-257 5 p.

Research output: Contribution to journal › Article

Norbornanes

Oxazines

Mass spectrometry

fragmentation

mass spectroscopy

3 Citations (Scopus)

Lactones and ketal-lactones prepared from AlCl₃-catalyzed reactions of cycloalkenedicarboxylic anhydrides with toluene

Szabó, J. A., Sohár, P., Böcskei, Z., Stájer, G. & Bernáth, G., 1999, In : Synthesis. 9, p. 1564-1568 5 p.

Research output: Contribution to journal › Article

Anhydrides

Toluene

Lactones

Norbornanes

Cycloparaffins

8 Citations (Scopus)

NMR and X-ray structural study of saturated (p-chlorophenyl)-pyrrolo[1,2-a][3,1]benzoxazin-1-ones prepared from aroylisobutyric acid and cyclic amino alcohols. High energy barriers for hindered rotation of bridgehead phenyl groups

Tähtinen, P., Sillanpää, R., Stájer, G., Szabó, A. E. & Pihlaja, K., Oct 1999, In : Journal of the Chemical Society, Perkin Transactions 2. 10, p. 2011-2021 11 p.

Research output: Contribution to journal › Article

Amino Alcohols

Energy barriers

Nuclear magnetic resonance

Oxazolone

Derivatives

10 Citations (Scopus)

Stereospecific fragmentation processes in cycloalkane/cycloalkene-fused isomers of saturated pyrrolo[2,1-b][1,3]oxazin-6-one derivatives

Pihlaja, K., Ovcharenko, V. V. & Stájer, G., 1999, In : Journal of the American Society for Mass Spectrometry. 10, 5, p. 393-401 9 p.

Research output: Contribution to journal › Article

Cycloparaffins

Isomers

Ions

Derivatives

X-Ray Diffraction

1 Citation (Scopus)

Structures of isobenzofuranone-substituted diexo-norbornane/ene- azetidinones

Böcskei, Z., Sohár, P. & Stájer, G., Dec 7 1999, In : Journal of Molecular Structure. 513, 1-3, p. 63-67 5 p.

Research output: Contribution to journal › Article

Norbornanes

X ray analysis

Nuclear magnetic resonance

X-Rays

nuclear magnetic resonance

17 Citations (Scopus)

Synthesis and structure of norbornane/ene-fused thiouracils and thiazino[3,2-a]pyrimidinones

Stájer, G., Szabó, A. E. & Sohár, P., Aug 1 1999, In : Heterocycles. 51, 8, p. 1849-1854 6 p.

Research output: Contribution to journal › Article

Norbornanes

Pyrimidinones

Thiouracil

Heating

Isothiocyanates

2 Citations (Scopus)

Two isomers of 1,4a,5,7,8,9,9a,10,11,12a-decahydro-1,4-methanocyclopenta[b]-pyrrolo[1,6a-a][3, 1]benzoxazin-11-one

Stájer, G., Virág, M. & Sillanpää, R., Aug 15 1999, In : Acta Crystallographica Section C: Crystal Structure Communications. 55, 8, p. 1342-1344 3 p.

Research output: Contribution to journal › Article

Benzoxazines

X ray crystallography

X Ray Crystallography

Isomers

crystallography