Patents by Inventor Erika Horvath nee Sziki

Erika Horvath nee Sziki 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 preparing ondansetron
    Patent number: 5478949
    Abstract: The invention relates to carbazolone derivatives of the formula ##STR1## wherein A stands for a group of formula--CH.sub.2 --R (V),wherein R means a hydroxyl or 2-methyl-1H-imidazol-1-yl group;B represents a group of formula ##STR2## wherein R.sub.1 means hydrogen or a methyl or ethyl group; or A and B together form a group of formula ##STR3## wherein R.sub.2 means a methyl or ethyl group; or A and B together form a group of formula ##STR4## The above compounds are useful intermediates in the synthesis of ondansetron of formula ##STR5## chemically 9-methyl-3-[(2-methyl-1H-imidazol-1-yl)methyl]-1,2,3,9-tetrahydro-4H-carba zol-4-one.The invention further relates to a novel process for the preparation of compounds of the formula (I) , wherein A and B are the same as in formula (I) but B may be also hydrogen. Thus, this novel process is suitable for the preparation of ondansetron itself.
    Type: Grant
    Filed: November 25, 1994
    Date of Patent: December 26, 1995
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt.
    Inventors: Peter Bod, Kalman Harsanyi, Ferenc Trischler, Eva Fekecs, Attila Csehi, Bela Hegedus, Eva Mersich nee Donat, Gyorgyi Szabo nee Komlosi, Erika Horvath nee Sziki
  • Carbazolone derivatives
    Patent number: 5416221
    Abstract: The invention relates to carbazolone derivatives of the formula ##STR1## wherein A stands for a group of formula--CH.sub.2 --R (V),wherein R means a hydroxyl or 2-methyl-1H-imidazol-1-yl group;B represents a group of formula ##STR2## wherein R.sub.1 means hydrogen or a methyl or ethyl group; or A and B together form a group of formula ##STR3## wherein R.sub.2 means a methyl or ethyl group; or A and B together form a group of formula ##STR4## The above compounds are useful intermediates in the synthesis of ondansetron of formula ##STR5## chemically 9-methyl-3-[(2-methyl)-1H-imidzol-1-yl)methyl]1,2,3,9-tetrahydro-4H-carbaz ol-4-one.The invention further relates to a novel process for the preparation of compounds of the formula (I), wherein A and B are the same as in formula (I) but B may be also hydrogen. Thus, this novel process is suitable for the preparation of ondansetron itself.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: May 16, 1995
    Inventors: Peter Bod, Kalman Harsanyi, Ferenc Trischler, Eva Fekecs, Attila Csehi, Bela Hegedus, Eva Mersich ne/ e Donat, Gyorgyi Szabonee Komlosi, Erika Horvath nee Sziki