The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1976
Filed:
Aug. 08, 1973
Applicant:
Inventors:
Assignee:
AGFA-Gevaert, A.G., Leverkusen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ;
Abstract
Preparation of 1-aryl-3-anilino-pyrazolones-(5) by reacting a hydrazine with an ester from the group of dialkoxyacrylic acid ester, trialkoxy propionic acid ester or iminoalkoxy propionic acid ester to produce a .beta.-hydrazine-.beta.-alkoxyacrylic acid ester and then condensing this intermediate product with an aniline to result in the desired anilinopyrazolone. These reactions are carried out in a methanolic solution in the presence of an acetic acid catalyst.