Patents by Inventor Irena Krizmanic

Irena Krizmanic 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).

  • PROCESS FOR THE PREPARATION OF ETRAVIRINE AND INTERMEDIATES IN THE SYNTHESIS THEREOF
    Publication number: 20130123498
    Abstract: The present invention includes compounds of Formula 1 of the following structure: or salts thereof, wherein X is a halogen or a tosyl group. Processes for preparing the compounds of Formula 1 are disclosed in the patent application. The compounds of Formula 1 are useful as intermediates for preparation of Etravirine. The present invention is also directed toward processes for preparing Etravirine.
    Type: Application
    Filed: October 19, 2012
    Publication date: May 16, 2013
    Inventors: Maja Sepelj MAJER, Irena KRIZMANIC, Gordana VRBANEC
  • PROCESS FOR THE PREPARATION AND PURIFICATION OF ETRAVIRINE AND INTERMEDIATES THEREOF
    Publication number: 20130035485
    Abstract: In one embodiment the present invention encompasses 4-(2,6-dichloropyrimidin-4-yloxy)-3,5-dimethylbenzonitrile (“ETHER”), 4-(4,6-dichloropyrimidin-2-yloxy)-3,5-dimethyl-benzonitrile (“ETHER C-2 isomer”), mixtures and salts thereof of. The present invention encompasses the use of ETHER and salts thereof to prepare Etravirine and Etravirine intermediates, and salts thereof. In another embodiment the present invention encompasses the use of ETHER and salts thereof to prepare debrometravirine (“DEBETV”) and salts thereof. In yet another embodiment the present invention encompasses the use of ETHER and salts thereof to prepare 4-(6-chloro-2-(4-cyanophenylamino)pyrimidin-4-yloxy)-3,5-dimethyl-benzonitrile (“ARCPBN”) and salts thereof.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 7, 2013
    Inventors: Irena KRIZMANIC, Jasna Dogan, Marina Marinkovic, Maja Sepelj
  • PROCESS FOR THE PREPARATION AND PURIFICATION OF ETRAVIRINE AND INTERMEDIATES THEREOF
    Publication number: 20110275812
    Abstract: In one embodiment the present invention encompasses 4-(2,6-dichloropyrimidin-4-yloxy)-3,5-dimethylbenzonitrile (“ETHER”), 4-(4,6-dichloropyrimidin-2-yloxy)-3,5-dimethyl-benzonitrile (“ETHER C-2 isomer”), mixtures and salts thereof of. The present invention encompasses the use of ETHER and salts thereof to prepare Etravirine and Etravirine intermediates, and salts thereof. In another embodiment the present invention encompasses the use of ETHER and salts thereof to prepare debrometravirine (“DEBETV”) and salts thereof. In yet another embodiment the present invention encompasses the use of ETHER and salts thereof to prepare 4-(6-chloro-2-(4-cyanophenylamino)pyrimidin-4-yloxy)-3,5-dimethyl-benzonitrile (“ARCPBN”) and salts thereof. The compound, 4-(2,6-dichloropyrimidin-4-yloxy)-3,5-dimethylbenzonitrile “ETHER” of formula (A) wherein n is either 0 or 1 and HA is an acid.
    Type: Application
    Filed: July 27, 2010
    Publication date: November 10, 2011
    Inventors: Irena Krizmanic, Jasna Dogan, Marina Marinkovic, Maja Sepelj
  • Impurities of Donepezil
    Publication number: 20090298879
    Abstract: The present invention relates to impurities of donepezil, or a pharmaceutically acceptable salt thereof, which may be produced during synthesis and storage of donepezil, or a pharmaceutically-acceptable salt thereof, and to methods of identifying such impurities. The invention also relates to the use of these impurities in analytical techniques and to product that contain certain low levels of these impurities in particular the following impurities are disclosed: formula (I) and formula (II).
    Type: Application
    Filed: May 18, 2007
    Publication date: December 3, 2009
    Applicant: PLIVA Hrvatska d.o.o.
    Inventors: Irena Krizmanic, Lidija Lerman, Zrinka Samardzic, Katarzyna Kaczorowska, Andrzej Manikowski, Barbara Zioro, Ivica Grebenar, Jasna Dogan Koruznjak