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51

Formation and role of ester groups in the thermal stabilization of PVC

Gy. Lévai, Gy. Ocskay, Zs. Nyitrai

Journal:

Macromolecular Materials and Engineering

Year:

1985

Language:

english

File:

PDF, 288 KB

english, 1985

52

Konformationsanalyse und 13C-NMR-Untersuchungen einiger 1,4-Benzoxazepin-Derivate1)

Helmut Duddeck, Albert Lévai

Journal:

Archiv der Pharmazie

Year:

1983

Language:

german

File:

PDF, 290 KB

german, 1983

53

Oxazepines and Thiazepines, XXIII1): An Efficient Synthesis of 2,3-Dihydro-1,5-benzoxazepin-4(5H)-ones

Jürgen Ott, Albert Lévai

Journal:

Archiv der Pharmazie

Year:

1990

Language:

english

File:

PDF, 195 KB

english, 1990

54

Oxazepines and Thiazepines, XXV: Chemical Transformations of 2,3-Dihydro-1,5-benzothiazepin-4(5H)-ones

Journal:

Archiv der Pharmazie

Year:

1992

Language:

english

File:

PDF, 303 KB

english, 1992

55

Oxazepines and Thiazepines, XXVII: Chemical Transformations of 2,3-Dihydro-2-phenyl-1,4-benzoxazepin-5(4H)-one

Albert Lévai, Zoltán Bálint

Journal:

Archiv der Pharmazie

Year:

1993

Language:

english

File:

PDF, 280 KB

english, 1993

56

Facile Synthesis of Tetrazolylchromonoids and Related Compounds

Tamás Patonay, Albert Lévai

Journal:

Archiv der Pharmazie

Year:

1994

Language:

english

File:

PDF, 360 KB

english, 1994

57

Eine einfache Darstellungsweise des (±)-erythro-1-p-Nitrophenyl-2-amino-propandiols-(1.3)

László Lévai, Katalin Ritvay-Emandity

Journal:

European Journal of Inorganic Chemistry

Year:

1959

Language:

german

File:

PDF, 251 KB

german, 1959

58

Zur Epimerisierung des (±)-erythro- und des (1S.2R)-1-p-Nitrophenyl-2-amino-propandiols-(1.3)

László Lévai, Gábor Fodor, Katalin Ritvay-Emandity, Oszkár Fuchs, Andor Hajós

Journal:

European Journal of Inorganic Chemistry

Year:

1960

Language:

german

File:

PDF, 379 KB

german, 1960

59

ChemInform Abstract: Synthesis and Cyclization of 1-(2-Hydroxyphenyl)-2-propen-1-one Epoxides: 3-Hydroxychromanones and -flavanones versus 2-(1- Hydroxyalkyl)-3-coumaranones.

T. PATONAY, A. LEVAI, C. NEMES, T. TIMAR, G. TOTH, W. ADAM

Journal:

Year:

1997

File:

PDF, 38 KB

1997

60

ChemInform Abstract: Synthesis of Benzothiazepines

Journal:

Year:

1997

File:

PDF, 22 KB

1997

61

ChemInform Abstract: Nitrogen-Containing Heterocyclic Compounds from Exocyclic α,β-Unsaturated Ketones

A. LEVAI, G. TOTH

Journal:

Year:

1997

File:

PDF, 27 KB

1997

62

ChemInform Abstract: Oxazepines and Thiazepines. Part 32. Synthesis of Tetracyclic Benzothiazepines

Journal:

Year:

1997

File:

PDF, 30 KB

1997

63

ChemInform Abstract: Oxazepines and Thiazepines. Part 33. An Efficient Procedure for the Preparation of 3-Acetyl-2,3-dihydrobenzothiazoles by Ring Contraction of 2,4-Diaryl-2,3-dihydro-1,5-benzothiazepines under Acetylating Conditions.

G. TOTH, A. LEVAI, B. BALAZS, A. SIMON

Journal:

Year:

1997

File:

PDF, 28 KB

1997

64

ChemInform Abstract: Dioxirane Oxidation of 1-Acetyl-2-arylidene-1H-indol-3(2H)-ones. Diastereoselective Formation of Spiroepoxides.

W. ADAM, A. LEVAI, J.-Y. MEROUR, C. NEMES, T. PATONAY

Journal:

Year:

1997

File:

PDF, 28 KB

1997

65

ChemInform Abstract: Conformational Analysis of 2,3-Dihydro-2,2-dimethyl-1,4-benzoxazepines and Their 1,5-Isomers.

G. TOTH, J. HALASZ, A. LEVAI, B. REZESSY

Journal:

Year:

1997

File:

PDF, 29 KB

1997

66

ChemInform Abstract: Synthesis of Pyrazolines by Reactions of α,β-Enones with Diazomethane and Hydrazines

Journal:

Year:

1997

File:

PDF, 27 KB

1997

67

ChemInform Abstract: 1,3-Dipolar Cycloaddition of 3-Arylidenechromanone, -1-thiachromanone and -flavanone: Regio- and Stereoselective Formation of Spiroheterocycles.

L. FISERA, L. JAROSKOVA, A. LEVAI, E. JEDLOVSKA, G. TOTH, M. POLAKOVA

Journal:

Year:

1998

File:

PDF, 33 KB

1998

68

ChemInform Abstract: Synthesis of Pyrazolines by the Reactions of α,β-Enones with Diazomethane and Hydrazines

Journal:

Year:

1998

File:

PDF, 27 KB

1998

69

ChemInform Abstract: Fused Heterocycles. Part 8. An Efficient Procedure for the Stereoselective Synthesis of trans-2,3,3a,4-Tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-c]pyrazoles and Their [1]Benzothiopyrano Analogues.

Journal:

Year:

1998

File:

PDF, 27 KB

1998

70

ChemInform Abstract: Synthesis of 4-Aryl-3-(2-chromonyl)-2-pyrazolines by the 1,3-Dipolar Cycloaddition of 2-Styrylchromones with Diazomethane.

D. C. G. A. PINTO, A. M. S. SILVA, L. M. P. M. ALMEIDA, J. A. S. CAVALEIRO, A. LEVAI, T. PATONAY

Journal:

Year:

1998

File:

PDF, 31 KB

1998

71

ChemInform Abstract: Enantioselective Epoxidation of Isoflavones by Jacobsen′s Mn(III)Salen Catalysts and Dimethyldioxirane Oxygen-Atom Source.

W. ADAM, R. T. FELL, A. LEVAI, T. PATONAY, K. PETERS, A. SIMON, G. TOTH

Journal:

Year:

1998

File:

PDF, 31 KB

1998

72

ChemInform Abstract: Synthesis of Novel [(5H-Tetrazolyl)alkoxy]-Substituted Chromone and Chromanone Derivatives.

T. PATONAY, A. LEVAI, L. HEGEDUES, E. PATONAY-PELI

Journal:

Year:

1998

File:

PDF, 35 KB

1998

73

ChemInform Abstract: Oxazepines and Thiazepines. Part 37. A Simple and Convenient Procedure for the Preparation of 3-Acyl-2,3-dihydrobenzothiazoles by Ring Contraction of 2,4-Diaryl-2,3-dihydro-1,5-benzothiazepines under Acylating Conditions.

Journal:

Year:

1998

File:

PDF, 29 KB

1998

74

ChemInform Abstract: Enantioselective Synthesis and Chiroptical Properties of Optically Active Isoflavone Epoxides.

A. LEVAI, W. ADAM, R. T. FELL, R. GESSNER, T. PATONAY, A. SIMON, G. TOTH

Journal:

Year:

1999

File:

PDF, 32 KB

1999

75

ChemInform Abstract: Dimethyldioxirane Oxidations of Some Heterocycles Containing Oxygen or Sulfur: Chemo- and Stereoselectivity

Tamas Patonay, Waldemar Adam, Albert Levai

Journal:

Year:

1999

File:

PDF, 25 KB

1999

76

ChemInform Abstract: Synthesis of Benzoxazepines

Journal:

Year:

1999

File:

PDF, 23 KB

1999

77

ChemInform Abstract: Utilization of the Chiroptical Spectroscopies for the Structure Elucidation of Flavonoids and Related Benzopyran Derivatives

Journal:

Year:

1999

File:

PDF, 25 KB

1999

78

ChemInform Abstract: Oxazepines and Thiazepines. Part 36. Diastereoselective Sulfoxidation of 2,3-Dihydro-1,5-benzothiazepin-4(5H)-ones by Dimethyldioxirane.

Tamas Patonay, Waldemar Adam, Jozsef Jeko, Katalin E. Koever, Albert Levai, Marta Nemeth, Karl Peters

Journal:

Year:

1999

File:

PDF, 35 KB

1999

79

ChemInform Abstract: Reaction of E-2-Arylidene-1-indanones, Z-Aurones, Z-1-Thioaurones and Z-2-Arylidene-2,3-dihydro-1H-indole-3-ones with Diazomethane.

Albert Levai, Tamas Patonay

Journal:

Year:

1999

File:

PDF, 31 KB

1999

80

ChemInform Abstract: Optically Active 1,5-Benzothiazepines

Journal:

Year:

1999

File:

PDF, 23 KB

1999

81

ChemInform Abstract: Synthesis of Spiropyrazolines via 1,3-Dipolar Cycloaddition of Nitrilimines.

Eva Jedlovska, Albert Levai, Gabor Toth, Barbara Balazs, Lubor Fisera

Journal:

Year:

2000

File:

PDF, 29 KB

2000

82

ChemInform Abstract: Synthesis of Spiro-1-pyrazolines by the 1,3-Dipolar Cycloaddition of Exocyclic α,β-Unsaturated Ketones with Diazomethane.

Albert Levai, Artur M. S. Silva, Tamas Patonay, Jose A. S. Cavaleiro

Journal:

Year:

2000

File:

PDF, 33 KB

2000

83

ChemInform Abstract: Synthesis of 2,2-Dimethyl-2H-chromenes

Albert Levai, Tibor Timar, Peter Sebok, Tibor Eszenyi

Journal:

Year:

2000

File:

PDF, 24 KB

2000

84

ChemInform Abstract: Synthesis and Chemical Transformations of 1,5-Benzothiazepines

Journal:

Year:

2000

File:

PDF, 24 KB

2000

85

ChemInform Abstract: A Comparative Study of the Epoxidation of 2-Substituted Isoflavones by Dimethyldioxirane, Sodium Hypochlorite, and Alkaline Hydrogen Peroxide (Weitz—Scheffer Reaction).

Albert Levai, Tamas Patonay, Andrea Szekely, Erzsebet B. Vass, Waldemar Adam

Journal:

Year:

2001

File:

PDF, 35 KB

2001

86

ChemInform Abstract: Synthesis of 2,2-Dimethyl-4-chromanones

Tibor Timar, Albert Levai, Tibor Eszenyi, Peter Sebok

Journal:

Year:

2001

File:

PDF, 24 KB

2001

87

ChemInform Abstract: Reactivity of α-Arylidene Benzoheteracyclanone Dibromides Toward Azide Ion: An Effective Approach to 3-(α-Substituted-benzyl)chromones and -1-thiochromones.

Tamas Patonay, Zoltan Dinya, Albert Levai, Denes Molnar

Journal:

Year:

2001

File:

PDF, 37 KB

2001

88

ChemInform Abstract: Chemo- and Diastereoselectivity in the Dimethyldioxirane Oxidation of 2,3-Dihydro-4H-1-benzothiopyran-4-ones and 4H-1-Benzothiopyran-4-ones. Unusual Reactivity of 4H-1-Benzothiopyran-4-one 1-Oxides.

Tamas Patonay, Waldemar Adam, Albert Levai, Peter Koever, Marta Nemeth, Eva-Maria Peters, Karl Peters

Journal:

Year:

2001

Language:

english

File:

PDF, 35 KB

english, 2001

89

ChemInform Abstract: Epoxidation of (Z)-3-Arylidene-1-thioflavanones.

Albert Levai, Gabor Toth, Jozsef Kovacs, Tamas Patonay, Erzsebet B. Vass

Journal:

Year:

2001

File:

PDF, 26 KB

2001

90

ChemInform Abstract: Synthesis and Chemical Transformations of 1,4-, 4,1- and 1,5-Benzoxazepines.

Journal:

Year:

2002

File:

PDF, 24 KB

2002

91

ChemInform Abstract: Dimethyldioxirane Oxidation of (E,E)-Cinnamylideneacetophenones.

Albert Levai, Artur M. S. Silva, Jose A. S. Cavaleiro, Tamas Patonay, Vera L. M. Silva

Journal:

Year:

2002

Language:

english

File:

PDF, 32 KB

english, 2002

92

ChemInform Abstract: Improved Industrial Synthesis of Antidepressant Sertraline.

Krisztina Vukics, Tamas Fodor, Janos Fischer, Iren Fellegvari, Sandor Levai

Journal:

Year:

2002

File:

PDF, 28 KB

2002

93

ChemInform Abstract: Synthesis of 2-Pyrazolines by the Reactions of α,β-Unsaturated Aldehydes, Ketones, and Esters with Diazoalkanes, Nitrile Imines, and Hydrazines

Journal:

Year:

2002

File:

PDF, 28 KB

2002

94

ChemInform Abstract: Asymmetric Weitz—Scheffer Epoxidation of Isoflavones with Hydroperoxides Mediated by Optically Active Phase-Transfer Catalysts.

Waldemar Adam, Paraselli Bheema Rao, Hans-Georg Degen, Albert Levai, Tamas Patonay, Chantu R. Saha-Moeller

Journal:

Year:

2002

File:

PDF, 37 KB

2002

95

Synthesis of Spiro-1-pyrazolines by the Reaction of Z-3-Arylidene-1-thioflavanones with Diazomethane.

Journal:

Year:

2002

File:

PDF, 31 KB

2002

96

Synthesis of 3-Aryl-5-styryl-2-pyrazolines by the Reaction of (E,E)-Cinnamylideneacetophenones (I) with Hydrazines and Their Oxidation into Pyrazoles.

Albert Levai, Tamas Patonay, Artur M. S. Silva, Diana C. G. A. Pinto, Jose A. S. Cavaleiro

Journal:

Year:

2002

File:

PDF, 31 KB

2002

97

Dimethyldioxirane Oxidation of the Epoxides of (Z)-3-Arylidene-1-thioflavanones.

Albert Levai, Tamas Patonay, Gabor Toth, Jozsef Kovacs, Jozsef Jeko

Journal:

Year:

2002

File:

PDF, 31 KB

2002

98

Synthesis of Vinca Alkaloids and Related Compounds. Part 98. Oxidation with Dimethyldioxirane of Compounds Containing the Aspidospermane and Quebrachamine Ring System. A Simple Synthesis of (7S,20S)-(+)-Rhazidigenine and (2R,7S,20S)-(+)-Rhazidine.

Janos Eles, Gyoergy Kalaus, Albert Levai, Istvan Greiner, Maria Kajtar-Peredy, Pal Szabo, Lajos Szabo, Csaba Szantay

Journal:

Year:

2002

File:

PDF, 32 KB

2002

99

Synthesis of 3-Aroyl-4-(3-chromonyl)-2-pyrazolines.

Albert Levai, Jozsef Jeko

Journal:

Year:

2003

File:

PDF, 96 KB

2003

100

Epoxidation of Homoisoflavones.

Journal:

Year:

2003

File:

PDF, 93 KB

2003

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