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:
Jul. 24, 1990
Filed:
Apr. 14, 1989
Applicant:
Inventors:
Taiiti Okada, Kyoto, JP;
Toru Ishida, Kobe, JP;
Assignee:
Takeda Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568709 ; 568713 ;
Abstract
An improved industrial process for producing a compound of the general formula: ##STR1## wherein R is an alkyl group having 1 to 4 carbon atoms which comprises reacting a compound of the general formula: ##STR2## wherein R is as defined above with nitrous acid in a mixed solvent of water and a water-insoluble or slightly soluble organic solvent.