Patents by Inventor Gyula Siming

Gyula Siming 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).

  • Azetidinone acetic acid derivatives and process for the preparation thereof
    Patent number: 4587049
    Abstract: The invention relates to compounds of the general formula (X) ##STR1## wherein R is as a removable protecting substituent of the amido group a phenyl group or a benzyl group substituted by one or more alkoxy group(s) having 1-4 carbon atoms andR.sup.1 stands for a hydrogen atom or an alkyl group having 1-4 carbon atoms and a process for the preparation thereof.The compounds of the general formula (X) can be prepared from the starting materials of the general formula (V), wherein R and R.sup.1 are as stated above and Z is an alkyl group having 1-4 carbon atoms.The compounds of the general formula (X) are useful pharmaceutical intermediates which can be used in the preparation of known antibiotics (e.g. Thienamycin and PS-5).
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: May 6, 1986
    Assignees: Richter Gedeon Vegyeszeti Gyar RT, Byogal Gyogyszergyar
    Inventors: Karoly Lempert, Ferenc Bartha, Gabor Doleschall, Jozsef Fetter, Gyula Hornyak, Jozsef Nyitrai, Gyula Siming, Karoly Zauer