Patents by Inventor Ervin Vajda

Ervin Vajda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pocess for the preparation of high purity prostaglandins
    Patent number: 10501410
    Abstract: The subject of the invention is a process for the preparation of high purity prostaglandin acid of the general formula II wherein the bonds marked with dotted lines represent single or double bonds wherein the double bonds may be cis- or trans oriented, Y represents O or CH2, and R3 stands for a phenyl group which is optionally substituted with CF3, wherein the crude prostaglandin acid of the general formula II is purified by normal phase silicagel chromatography.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: December 10, 2019
    Assignee: CHINOIN GYÓGYSZER ÉS VEGYÉSZETI TERMÉKEK GYÁRA ZRT.
    Inventors: Ervin Vajda, Irén Hortobágyi, István Lászlofi, Péter Buzder-Lantos, Gábor Havasi, László Takács, Zsuzsanna Kardos
  • NEW PROCESS FOR THE PREPARATION OF HIGH PURITY PROSTAGLANDINS
    Publication number: 20170037002
    Abstract: The subject of the invention is a process for the preparation of high purity prostaglandin acid of the general formula II wherein the bonds marked with dotted lines represent single or double bonds wherein the double bonds may be cis- or trans oriented, Y represents 0 or CH2, and R3 stands for a phenyl group which is optionally substituted with CF3, wherein the crude prostaglandin acid of the general formula II is purified by normal phase silicagel chromatography.
    Type: Application
    Filed: March 11, 2015
    Publication date: February 9, 2017
    Applicant: CHINOIN GYÓGYSZER ÉS VEGYÉSZETI TERMÉKEK GYÁRA ZRT.
    Inventors: Ervin VAJDA, Irén HORTOBÁGYI, István LÁSZLOFI, Péter BUZDER-LANTOS, Gábor HAVASI, László TAKÁCS, Zsuzsanna KARDOS
  • Process for the stereoselective reduction of &agr;,&bgr;-unsaturated ketones
    Patent number: 6482959
    Abstract: A process for the preparation of &agr;,&bgr;-unsaturated alcohols of general formula (I), wherein R means an alkyl group of 1-4 carbon atoms, or benzoyloxy group optionally substituted with a phenyl group; R1 means a hydrogen atom or an alkyl group of 1-4 carbon atoms, R2 means a hydrogen atom or an alkyl group of 1-4 carbon atoms; R3 means an alkyl group of 1-6 carbon atoms optionally substituted by phenyl group or cycloalkyl group of 5-7 carbon atoms; or a phenoxy group optionally substituted by a halogen atom, or a cycloalkyl group of 5-7 carbon atoms; R4 means a hydrogen atom or a halogen atom whereby at &agr;,&bgr;-unsaturated ketones of general formula (II) wherein the meanings of R, R1, R2, R3, and R4 are as given above—is diastereoselectively reduced with a borohydride type compound in an aprotic solvent, in the presence of an inorganic substance dissolublein the reaction mixture and having particle size from 0.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: November 19, 2002
    Assignee: Chinoin Gyógyszer és Vegyészeti Termékek Gyára Rt.
    Inventors: Kardos Zsuzsanna Baloghne, Nandor Benno, Povarny Magdonla Beresne, Gyula Dalmadi, Katalin Ebinger, Laszlo Forro, Geza Galambos, Felix Hajdu, Istvan Hermecz, Geza Lukacs, Karoly Mozsolits, Szigeti Katalin Polikne, Judit Sebestyen, Tobor Szabo, Zoltan Szeverenyi, Ervin Vajda, Gabor Vankai, Pal Vofely
  • Process for the preparation of prostaglandin E1
    Patent number: 6069269
    Abstract: New process for the preparation of prostaglandin E1 of formula (I) starting from the compound of formula (II).
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: May 30, 2000
    Assignee: CHINOIN Gyogyszer es Vegyeszeti
    Inventors: Gyula Dalmadi, Felix Hajdu, Istvan Hermecz, Karoly Mozsolits, Tibor Szabo, Zoltan Szeverenyi, Ervin Vajda