Patents by Inventor Lothar Zenkar

Lothar Zenkar 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).

  • 3-carbalkoxyamino-5-(alpha-aminopropionyl)-5H-dibenz[b,f]azepines and method for their making
    Patent number: 5192760
    Abstract: New 3-carbalkoxyamino-5-(alpha-aminopropionyl)-5H-dibenz[b,f]azepines of formula I and their pharmaceutically acceptable salts were found to be suitable actives for the treatment of cardiac arrhythmia. Previously unknown 3-carbalkoxyamino-5-(alpha-halogenpropionyl)-5H-dibenz[b,f]azepines are obtained from 3-carbalkoxyamino-5H-dibenz[b,f]azepines by reaction with alpha-halogenpropionyl halides. Through their reaction with ammonia, primary amines or secondary amines, the new 3-carbalkoxyamino-5-(alpha-aminopropionyl)-5H-dibenz[b,f]azepines are obtained, which can be optionally converted into their pharmaceutically acceptable acid addition salts.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: March 9, 1993
    Assignee: Arzneimittelwerk Dresden GmbH
    Inventors: Helmut Wunderlich, Andreas Stark, Dieter Lohmann, Lothar Zenkar, Reni Bartsch, Hildegard Poppe, Aleksandr P. Skoldinov, Natalja V. Kaverina, Anna N. Grizenko, Valentin V. Lyskovzev, Ekaterina K. Grigoreva