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1

4H-3.1-Benzoxazinone-(4), VI. Einwirkung von Phosphoroxychlorid auf 2-[2.4-Dioxo-1.2.3.4-tetrahydro-chinazolyl-(3)]-benzoesäure-[2-hydroxy-äthylamid]. Umwandlung eines Dihydro-12H-chinazolino[2.1-b]chinazolindions-(5.12) in ein Tetrahydro-imidazo[2.1-b]chinazolinon-(5)

Gäbor Doleschall, Károly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1966

Language:

german

File:

PDF, 506 KB

german, 1966

2

Hydantoine, Thiohydantoine, Glykocyamidine, XXXI Durch Lewis-Säuren ausgelöste reduktive Umlagerungen vom Retrobenzilsäure-Typ, VII Das anomale Verhalten des 5.5-Dibenzyl-dithiohydantoins und des 2.5-Bis-methylmercapto-4.4-dibenzyl-4H-imidazols

Rózsa Markovits-Kornis, József Nyitrai, Károly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1971

File:

PDF, 402 KB

1971

3

Thermisch induzierte Reaktionen von Imidazolderivaten, III. Eine thermisch ausgelöste Retrobenzilsäure-artige Umlagerung von 2,4,4 -Triaryl-5-alkylthio-, -5-aralkylthio- und -5-arylthio-4H-imidazolen

József Nyitrai, Károly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1974

Language:

german

File:

PDF, 453 KB

german, 1974

4

ChemInform Abstract: Simple and Condensed β-Lactams. Part 31. Acid-Catalyzed Ring Closures and Ring Transformations of Some 3-Aryloxy-4-oxoazetidine-2-carbaldehydes.

Ferenc Bertha, Jozsef Fetter, Maria Kajtar-Peredy, Karoly Lempert, Gabor Czira

Journal:

Year:

1999

File:

PDF, 36 KB

1999

5

Simple and condensed β-lactams. Part 27. Reaction of 1-(4-methoxyphenyl)-4-(tetrazol-5-yl)azetidin-2-one and 1-(4-methoxyphenyl)-5-(tetrazol-5-yl-methyl)pyrrolidin-2-one with cerium(IV) ammonium nitrate (CAN)

Le Thanh Giang, József Fetter, Károly Lempert, Mária Kajtár-Peredy, Ágnes Gömöry

Journal:

Year:

1996

Language:

english

File:

PDF, 1.27 MB

english, 1996

6

Benzoxadiazocines, benzothiadiazocines and benzotriazocines—I : General considerations and the synthesis of two 3,1,6-benzoxadiazocines

Gyula Hornyák, Károly Lempert

Journal:

Year:

1983

Language:

english

File:

PDF, 259 KB

english, 1983

7

Thermisch induzierte Reaktionen von Imidazolderivaten, IV. Die Kinetik der thermischen Umlagerung von 2,4,4-Thriaryl-5-mathylthio-4H-imidazolen

József Nyitrai, Károly Lempert, Tamás Cserfalvi

Journal:

European Journal of Inorganic Chemistry

Year:

1974

File:

PDF, 167 KB

1974

8

Simple and condensed β-lactams. Part 22. An unprecedented ring transformation accompanying dephthaloylation of a 3-phthalimidoazetidin-2-one

József Fetter, Helga Vásárhelyi, Mária Kajtár-Peredy, Károly Lempert, József Tamás, Gábor Czira

Journal:

Year:

1995

Language:

english

File:

PDF, 778 KB

english, 1995

9

ChemInform Abstract: THERMISCH INDUZIERTE REAKTIONEN VON IMIDAZOLDERIVATEN 4. MITT. KINETIK DER THERMISCHEN UMLAGERUNG VON 2,4,4-TRIARYL-5-METHYLTHIO-4H-IMIDAZOLEN

NYITRAI, JOZSEF, LEMPERT, KAROLY, CSERFALVI, TAMAS

Journal:

Chemischer Informationsdienst

Year:

1974

File:

PDF, 105 KB

1974

10

ChemInform Abstract: DURCH LEWIS-SAEUREN AUSGELOESTE REDUKTIVE UMLAGERUNGEN VOM RETROBENZILSAEURE-TYP 6. MITT. KREUZUNGSVERSUCHE

KOLTAI, ERNOE, NYITRAI, JOZSEF, LEMPERT, KAROLY, BURSICS, LASZLO

Journal:

Chemischer Informationsdienst. Organische Chemie

Year:

1971

File:

PDF, 216 KB

1971

11

ChemInform Abstract: HYDANTOINE, THIOHYDANTOINE UND GLYKOCYAMIDINE 34. MITT. THERMISCH INDUZIERTE RK. VON IMIDAZOLDERIVATEN1. MITT. THERMOLYSE VON 2,5-BIS-(METHYLMERCAPTO)-4,4-DIPHENYL-4H-IMIDAZOL

ZAUER, KAROLY, ZAUER-CSUELLOEG, IREN, LEMPERT, KAROLY

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 208 KB

1973

12

Thermisch induzierte Reaktionen von Imidazolderivaten, V. Thermische Umlagerungen von 2,4,4-Triaryl-5-methylthio-4H-imidazolen. Ein Kreuzversuch

Ernö Koltai, József Nyitrai, Károly Lempert, László Bursics

Journal:

European Journal of Inorganic Chemistry

Year:

1974

File:

PDF, 223 KB

1974

13

Rearrangement of N-cyano-anthranilic acids to 1,2-dihydro-2-imino-3,1,4H-benzoxazin-4-ones and 2,4(IH,3H)-quinazoline-diones. Reactions of 1,2-dihydro-2-imino-3,1,4H-benzoxazin-4-one with hydroxylic reagents.

Károly Lempert, Gábor Doleschall

Journal:

Tetrahedron Letters

Year:

1963

Language:

english

File:

PDF, 146 KB

english, 1963

14

as-Triazine und kondensierte Derivate, XVIII. Zur Ring-Ketten-Tautomerie bei 3-Hydroxythiazolo[3,2-b]-as-triazin-7-onen

Gábor Tóth, Gyula Hornyák, Károly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1977

File:

PDF, 224 KB

1977

15

Simple and condensed β-lactams, part 31. Acid catalyzed ring closures and ring transformations of some 3-aryloxy-4-oxoazetidine-2-carbaldehydes

Ferenc Bertha, József Fetter, Mária Kajtár-Peredy, Károly Lempert, Gábor Czira

Journal:

Year:

1998

Language:

english

File:

PDF, 887 KB

english, 1998

16

On the anomalous behaviour of certain 1-(4-methoxyphenyl)azetidin-2-ones towards cerium(IV) ammonium nitrate (CAN). Structure-reactivity studies

Attila Sápi, Ferenc Bertha, József Fetter, Mária Kajtár-Peredy, György M Keserű, Károly Lempert

Journal:

Year:

1996

Language:

english

File:

PDF, 558 KB

english, 1996

17

ChemInform Abstract: Simple and Condensed β-Lactams. Part 34. Oxidative Cyclization by Lead(IV) Acetate of 1-(4-Methoxyphenyl)-4-(tetrazol-5-ylmethyl)azetidin-2-ones to 3-Methoxy-9,9a-dihydroazeto[1,2-a]tetrazolo[5,1-d] [1,5]benzodiazepin-11(10H)-ones and Related Reactions.

Le Thanh Giang, Jozsef Fetter, Maria Kajtar-Peredy, Karoly Lempert, Ferenc Bertha, Gyoergy M. Keseru, Gabor Czira, Tibor Czuppon

Journal:

Year:

1999

File:

PDF, 35 KB

1999

18

Dissimilar reactivities of diastereomeric 1,1,1-trifluoro-3-(4-methoxyphenyl)-2,3-diphenylpropan-2-ols in an attempted elimination reaction

Gyula Hornyák, József Fetter, Károly Lempert, László Párkányi, Gábor Németh, László Poszávácz, Gyula Simig

Journal:

Journal of Fluorine Chemistry

Year:

2001

Language:

english

File:

PDF, 153 KB

english, 2001

19

Simple and condensed β-lactams. Part 33. AlCl3 catalyzed ring closures of some 3-aryloxy-4-oxoazetidine-2-carboxylic chlorides to 1H-chromeno[3,2-b]azete-2,8(2aH,8aH)-diones and some reactions of the products

Ferenc Bertha, József Fetter, Mária Kajtár-Peredy, Károly Lempert

Journal:

Year:

1999

Language:

english

File:

PDF, 749 KB

english, 1999

20

Hydantoine, Thiohydantoine, Glykocyamidine, XII. Über die Kondensation von Benzil mit Guanidin und n-Butylguanidin

Magda Lempert-Sréter, Vera Solt, Károly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1963

Language:

german

File:

PDF, 337 KB

german, 1963

21

Oxidative Fragmentations of Some Azolyl Ketones and Related Compounds Induced by Cerium(IV) Ammonium Nitrate (CAN).

Ferenc Bertha, Le Thanh Giang, Jozsef Fetter, Maria Kajtar-Peredy, Karoly Lempert, Gabor Czira

Journal:

Year:

2004

Language:

english

File:

PDF, 130 KB

english, 2004

22

Studies into the Synthesis of Azolopyrrolidinobenzodiazepinones and Related Compounds. Oxidative Cyclizations, Oxidative Fragmentations and Oxidative Rearrangements in the Reactions of Azolylmethyl-N-phenyl-lactams and Related Compounds with Cerium(IV) Ammonium Nitrate.

Ferenc Bertha, Le Thanh Giang, Jozsef Fetter, Maria Kajtar-Peredy, Karoly Lempert, Ildiko Nagy, Gabor Czira

Journal:

Year:

2004

Language:

english

File:

PDF, 125 KB

english, 2004

23

Durch Lewis-Säuren ausgelöste reduktive Umlagerungen vom Retrobenzilsäure-Typ, VI. Kreuzungsversuche

Ernö Koltai, József Nyitrai, Károly Lempert, László Bursics

Journal:

European Journal of Inorganic Chemistry

Year:

1971

File:

PDF, 618 KB

1971

24

Thermolyse des 2,5-Bis(methylthio)-4,4-diphenyl-4H-imidazols

Károly Zauer, Irén Zauer-Csüllög, Károly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1973

Language:

german

File:

PDF, 608 KB

german, 1973

25

4H-3,1-Benzoxazinone-(4), 2. Mitt.: Die Reaktion von 1,2-Dihydro-2-imino-4H-3,1-Benzoxazinonen-(4) mit nukleophilen Reagentien und ihre Umwandlung in 1,2,3,4-Tetrahydro-chinazolindione-(2,4)

Gábor Doleschall, Károly Lempert

Journal:

Monatshefte für Chemie - Chemical Monthly

Year:

1964

Language:

german

File:

PDF, 838 KB

german, 1964

26

Studies into the synthesis of azolopyrrolidinobenzodiazepinones and related compounds. Oxidative cyclisations, oxidative fragmentations and oxidative rearrangements in the reactions of azolylmethyl-N-phenyl-lactams and related compounds with cerium (IV) ammonium nitrate

Bertha, Ferenc, Fetter, József, Kajtár-Peredy, Mária, Lempert, Károly, Nagy, Ildikó, Czira, Gábor

Journal:

Journal of Chemical Research (Miniprint)

Year:

2003

Language:

english

File:

PDF, 119 KB

english, 2003

27

4H-3,1-Benzoxazinone-(4), 3.Mitt.: Über die Königsche “N,N′-Diphenyl-guanidin-o,o′-dicarbonsäure”. Eine Richtigstellung

Gábor Doleschall, Károly Lempert

Journal:

Monatshefte für Chemie - Chemical Monthly

Year:

1964

Language:

german

File:

PDF, 233 KB

german, 1964

28

Oxidative fragmentations of some azolyl ketones and related compounds induced by cerium (IV) ammonium nitrate (CAN)

Bertha, Ferenc, Fetter, József, Kajtár-Peredy, Mária, Lempert, Károly, Czira, Gábor

Journal:

Journal of Chemical Research (Miniprint)

Year:

2003

Language:

english

File:

PDF, 165 KB

english, 2003

29

ChemInform Abstract: Simple and Condensed β-Lactams. Part 33. AlCl3 Catalyzed Ring Closures of Some 3-Aryloxy-4-oxoazetidine-2-carboxylic Chlorides to 1H-Chromeno[3,2-b]azete-2,8(2aH,8aH)-diones and Some Reactions of the Products.

Ferenc Bertha, Jozsef Fetter, Maria Kajtar-Peredy, Karoly Lempert

Journal:

Year:

1999

Language:

english

File:

PDF, 41 KB

english, 1999

30

ChemInform Abstract: THERMISCH INDUZIERTE REAKTIONEN VON IMIDAZOLDERIVATEN 5. MITT. THERMISCHE UMLAGERUNGEN VON 2,4,4-TRIARYL-5-METHYLTHIO-4H-IMIDAZOLEN, EIN KREUZVERSUCH

KOLTAI, ERNOE, NYITRAI, JOZSEF, LEMPERT, KAROLY, BURSICS, LASZLO

Journal:

Chemischer Informationsdienst

Year:

1974

File:

PDF, 107 KB

1974

31

Acetoxylation of β-lactams with lead(IV) Acetate

Le Thanh Giang, József Fetter, Mária Kajtár-Peredy, Károly Lempert, Gábor Czira

Journal:

Year:

1999

Language:

english

File:

PDF, 541 KB

english, 1999

32

Oxidative fragmentations of some azolyl ketones and related compounds induced by cerium (IV) ammonium nitrate (CAN)

Bertha, Ferenc, Fetter, József, Kajtár-Peredy, Mária, Lempert, Károly, Czira, Gábor

Journal:

Journal of Chemical Research

Year:

2003

Language:

english

File:

PDF, 160 KB

english, 2003

33

Hydantoine, Thiohydantoine, Glykocyamidine, XI. Darstellung einiger 2-[Dialkylamino-alkylimino]-imidazolidinon-(5)

Károly Lempert, Magda Lempert-Sréter, Judit Breuer, István Pataky, Klára A. Pfeifer

Journal:

European Journal of Inorganic Chemistry

Year:

1962

Language:

german

File:

PDF, 591 KB

german, 1962

34

Thermisch induzierte Reaktionen von Imidazolderivaten, VII: Thermische Umlagerungen von 2,4,4-Triaryl-5-methylthio-4H-imidazolen in Abwesenheit einer Wasserstoffquelle. Ein neues Hexaarylbiimidazolyl

György Domány, József Nyitrai, Károly Lempert, Wolfgang Voelter, Hans Horn

Journal:

European Journal of Inorganic Chemistry

Year:

1978

File:

PDF, 375 KB

1978

35

ChemInform Abstract: THERMISCH INDUZIERTE REAKTIONEN VON IMIDAZOLDERIVATEN 3. MITT. EINE THERMISCH AUSGELOESTE RETROBENZILSAEURE-ARTIGE UMLAGERUNG VON 2,4,4-TRIARYL-5-ALKYLTHIO-, -5-ARALKYLTHIO- UND -5-ARYLTHIO-4H-IMIDAZOLEN

NYITRAI, JOZSEF, LEMPERT, KAROLY

Journal:

Chemischer Informationsdienst

Year:

1974

File:

PDF, 205 KB

1974

36

Benzoxadiazocines, benzothiadiazocines and benzotriazocines—II : The synthesis of 3,4,5,6-tetrahydro- and 1,2,3,4,5,6-hexa-hydro-1,3,6-benzotriazocines

Ferenc Bertha, Gyula Hornyák, Károly Zauer, Károly Lempert

Journal:

Year:

1983

Language:

english

File:

PDF, 352 KB

english, 1983

37

4H-3,1-Benzoxazinone-(4), 1. Mitt.: Die Umlagerung von N-(2-Carboxyphenyl)-cyanamiden und N-(2-Carboxyphenyl)-carbodiimiden zu 1,2-Dihydro-2-imino-4H-3,1-benzoxazinonen-(4) und 1,2,3,4-Tetrahydrochinazolindionen-(2,4)

Károly Lempert, Gábor Doleschall

Journal:

Monatshefte für Chemie - Chemical Monthly

Year:

1964

Language:

german

File:

PDF, 647 KB

german, 1964

38

ChemInform Abstract: Simple and Condensed β-Lactams. Part 35. Acetoxylation of β-Lactams with Lead(IV) Acetate.

Le Thanh Giang Le Thanh Giang, Jozsef Fetter, Maria Kajtar-Peredy, Karoly Lempert, Gabor Czira

Journal:

Year:

2000

File:

PDF, 39 KB

2000

39

ChemInform Abstract: Relative Migratory Aptitudes of Hydrogen, Benzoyl, 4-Methoxyphenyl and 4-Nitrophenyl Groups in Some Unsaturated Carbenes (Vinylidenes).

Ferenc Bertha, Jozsef Fetter, Karoly Lempert, Maria Kajtar-Peredy, Gabor Czira, Erno Koltai

Journal:

Year:

2002

File:

PDF, 26 KB

2002

40

On the mechanism of carboxyl condensations by carbodiimides

Gábor Doleschall, Károly Lempert

Journal:

Tetrahedron Letters

Year:

1963

Language:

english

File:

PDF, 183 KB

english, 1963

41

ChemInform Abstract: Simple and Condensed β-Lactams. Part 32. Base- and Acid-Catalyzed Ring Expansions of 3-Substituted 4-Acetylazetidin-2-ones and Related Compounds.

Attila Sapi, Jozsef Fetter, Karoly Lempert, Maria Kajtar-Peredy, Gabor Czira

Journal:

Year:

1999

File:

PDF, 34 KB

1999

42

Electron deficient heteroaromatic ammonioamidates—XVI: The synthesis and photochemistry of ethyl N-(2-methyl-4-methylene-6,7-methylenedioxy- 3,4-dihydro-3-quinazolinyl)-N-phenylcarbamate

József Fetter, Károly Lempert, Jørgen Møller

Journal:

Year:

1978

Language:

english

File:

PDF, 631 KB

english, 1978

43

Zum Mechanismus der Reaktion von 2-Brom-N,N-dimethyl-2, 2-diphenylacetamid mit Natriummethoxid in 2,2-Dimethoxypropan. Eine Methode zum Nachweis des Radikalanion-Radikal-Kettenmechanismus

Gyula Simig, Karoly Lempert

Journal:

European Journal of Inorganic Chemistry

Year:

1979

Language:

german

File:

PDF, 145 KB

german, 1979

44

Studies into the synthesis of azolopyrrolidinobenzodiazepinones and related compounds. Oxidative cyclisations, oxidative fragmentations and oxidative rearrangements in the reactions of azolylmethyl-N-phenyl-lactams and related compounds with cerium (IV) ammonium nitrate

Bertha, Ferenc, Fetter, József, Kajtár-Peredy, Mária, Lempert, Károly, Nagy, Ildikó, Czira, Gábor

Journal:

Journal of Chemical Research

Year:

2003

Language:

english

File:

PDF, 162 KB

english, 2003

45

Simple and condensed β-lactams. Part 29. Synthesis and base-catalyzed ring transformation of 4-[(2RS,3SR)-3-hydroxy-1-(4-methoxyphenyl)-4-oxoazetidin-2-yl)]thiazol-2(3H)-one

Attila Sápi, József Fetter, Károly Lempert, Mária Kajtár-Peredy, Gábor Czira

Journal:

Year:

1997

Language:

english

File:

PDF, 441 KB

english, 1997

46

Relative migratory aptitudes of hydrogen, benzoyl, 4-methoxyphenyl and 4-nitrophenyl groups in some unsaturated carbenes (vinylidenes)

Ferenc Bertha, József Fetter, Károly Lempert, Mária Kajtár-Peredy, Gábor Czira, Ernő Koltai

Journal:

Year:

2001

Language:

english

File:

PDF, 137 KB

english, 2001

47

Benzoxadiazocines, benzothiadiazocines and benzotriazocines-IV : Ring closure of 1-(2-[n-(2-chloroethyl and 2-hydroxyethyl)-n-methylamino]phenyl)-3-phenylthioureas. tetrahydroquinoxaline vs.dihydro-3,1,6-benzothiadiazocine and hexahydro-1,3,6-benzotriazocinethione formation

Gyula Hornák, Károly Lempert, Etelka Pjeczka, Gábor Tóth

Journal:

Year:

1985

Language:

english

File:

PDF, 912 KB

english, 1985

48

1,2,4-triazines and condensed derivatives, XXI : on the formation and the crystal structure of the 2:1 adduct of 6-aza-2-thiothymine and triethyl amine.

George P. Voutsas, Cleanthis C. Venetopoulos, Alajos Kálmán, László Párkányi, Gyula Hornyák, Károly Lempert

Journal:

Tetrahedron Letters

Year:

1978

Language:

english

File:

PDF, 221 KB

english, 1978

49

Oxidative cyclization by lead(IV) acetate of 1-(4-methoxyphenyl)-4-(tetrazol-5-ylmethyl)azetidin-2-ones to 3-methoxy-9,9a-dihydroazeto[1,2-a]tetrazolo-[5,1-d][1,5]benzodiazepin-11(10H)-ones and related reactions

Le Thanh Giang, József Fetter, Mária Kajtár-Peredy, Károly Lempert, Ferenc Bertha, György M Keser″u, Gábor Czira, Tibor Czuppon

Journal:

Year:

1999

Language:

english

File:

PDF, 1.07 MB

english, 1999

50

Benzoxadiazocines, benzothiadiazocines and benzotriazocines-V : The synthesis of some 2-amino-6-methyl- and 2-amino-6-phenyl-5,6-dihydro-4h-3,1,6-benzothiadiazocines

Ferenc Bertha, Gyula Hornyák, Károly Zauer, Antal Feller, Károly Lempert, Etelka Pjecka, Gabor Tóth

Journal:

Year:

1985

Language:

english

File:

PDF, 730 KB

english, 1985

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