Györgyi Donáth Vereczkey

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Featured researches published by Györgyi Donáth Vereczkey.

Tetrahedron | 1995

A versatile building block for the synthesis of substituted cyclopropanephosphonic acid esters

László Töke; Zsuzsa M. Jászay; Imre Petneházy; György Clementis; Györgyi Donáth Vereczkey; István Kövesdi; Antal Rockenbauer; Katalin Kováts

Abstract By the effect of iodine, solid K 2 CO 3 and a lipophilic quaternary ammonium salt phosphonoacetic acid allylic esters 4 were converted to cyclopropanephosphonic acid derivatives anellated to a five membered lactone ring 6 serving as good starting material for biologically active products. The reaction of cyclopropanation has been assumed to proceed by SET induced radical type elemental steps. Direct evidences were given by ESR for the 6-endo regioselectivity in the closure of electrophilic radical 11 . An interesting and new exchange reaction of phosphonic ester moiety by iodine is also observed.

Archive | 1998

Process and intermediates for preparing 1-¬9'H-carbazol-4'-yloxy|-3-¬ 2''-(2'''- methoxy -phenoxy)-ethyl)-amino|-propan-2-ol¬carvedilol|

Laszlo Balazs; Jozsef Barkoczy; Judit Cselenyak; Imre Doman; Zoltan Greff; Tamás Gregor; Kalman Nagy; Peter Kotay Nagy; Norbert Nemeth; Zoltan Ratkai; Péter Seres; Gyula Simig; Tibor Szabo; Györgyi Donáth Vereczkey

Archive | 1998

Process for the preparation of a dihydropyridine derivative

Daniel Bozsing; Gyorgyi Kovanyi; Gyula Simig; György Krasznai; Gabor Blasko; Peter Tompe; Kalman Nagy; Györgyi Donáth Vereczkey; Gabor Nemei; Norbert Nemeth

Archive | 1998

A process and intermediate compounds for the preparation of amlodipine benzene sulphonate

Gábor Dr. Blask; Daniel Bozsing; Györgyi Lax Dr. Koványi; György Krasznai; Kalman Nagy; Gábor Német; Norbert Nemeth; Gyula Simig; Peter Tompe; Györgyi Donáth Vereczkey

Archive | 2000

Process for preparing (1R,2S,4R)-(-)-2-[(2'-{N,N-dimethylamino}-ethoxy)]-2-[phenyl]-1,7,7-tri-[methyl]-bicyclo[2.2.1] heptane and pharmaceutically acceptable acid addition salts thereof

Gyula Lukács; Gyula Simig; Tibor Mezei; Zoltan Budai; Márta Porcs-Makkay; György Krasznai; Kalman Nagy; Györgyi Donáth Vereczkey; Tibor Szabo; Norbert Nemeth; János Szulágyi

Archive | 2001

High purity (1R, 2S, 4R) -(-) -2- [ (2' -{N,N-dimethylamino} -ethoxy) ] -2- [phenyl] -1, 7,7 -tri - [methyl] -bicyclo [2.2.1] heptane and pharmaceutically acceptable acid addition salts thereof and a process for the preparation of these compounds as well as medicaments containing 1 or more of these compounds and their use

Gyula Lukács; Gyula Simig; Tibor Mezei; Zoltan Budai; Márta Porcs-Makkay; György Krasznai; Kalman Nagy; Györgyi Donáth Vereczkey; Tibor Szabo; Norbert Nemeth; János Szulágyi

Archive | 2000

High purity (1R,2S,4R)-(-)-2-[(2'-{N,N-dimethylamino}-ethoxy)]-2-[phenyl]-1,7,7-tri-[methyl]-bicyclo[2.2.1]heptane and pharmaceutically acceptable acid addition salts thereof

Gyula Lukács; Gyula Simig; Tibor Mezei; Zoltan Budai; Márta Porcs-Makkay; György Krasznai; Kalman Nagy; Györgyi Donáth Vereczkey; Tibor Szabo; Norbert Nemeth; János Szulágyi

Archive | 1998