Patents by Inventor Karl-Theo VON Meszoly

Karl-Theo VON Meszoly 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 of performing cyclization reactions using benzyl or pyridylamino malonic acid derivatives
    Patent number: 4079058
    Abstract: Process of producing a naphthyridine or quinoline compound of the formula: ##STR1## wherein R.sub.2, R.sub.3, R.sub.4, and R.sub.6 can be alkyl, and R.sub.1 is nitrogen or CH. The corresponding pyridyl- or phenylaminomethylenemalonic acid diester is cyclized to yield said compound and an alcohol. The malonic acid diester at below reaction temperature is added to a solvent, e.g., diphenyl benzene, at above reaction temperature in proportion so that the mixture attains reaction temperature. Good yields at high throughputs are achieved.
    Type: Grant
    Filed: October 1, 1976
    Date of Patent: March 14, 1978
    Assignee: Dynamit Nobel AG
    Inventors: Otto Ackermann, Karl-Theo VON Meszoly, Arnold Lenz