Patents by Inventor Hanna Fitek

Hanna Fitek 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).

  • Preparation of 24 alkyl analogs of cholecalciferol and non-racemic compounds
    Patent number: 7915241
    Abstract: Disclosed is a process for the preparation of 24-alkyl analogs of cholecalcyferol of Formula 1 having a (5E) or (5Z) configuration, wherein X represents a hydrogen atom, a hydroxy group or an OR1 group, where R1, R2 and R3 may be the same or different and represent groups suitable for hydroxyl protection, and R4 is a C1-6 alkyl chain or a C1-6 cykloalkyl group, optionally substituted with C1-3 alkyl groups, especially for calcipotriol. The invention also provides new intermediates and non-racemic compounds being valuable synthones for the synthesis of pharmacologically active substances.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: March 29, 2011
    Assignee: Instytut Farmaceutyczny
    Inventors: Andrzej Kutner, Jacek Martynow, Michal Chodynski, Wieslaw Szelejewski, Hanna Fitek, Malgorzata Krupa