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:
Jun. 29, 1976
Filed:
Oct. 25, 1974
Applicant:
Inventors:
Akio Fukui, Kyoto, JA;
Hiroshi Koike, Takatsuki, JA;
Takehiko Tanaka, Kobe, JA;
Yuji Ito, Amagasaki, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
260378 ; 260380 ;
Abstract
A process for the preparation of 1-substituted anthraquinones represented by the general formula I ##EQU1## where, in the formula, R.sub.1 and R.sub.2 represent individually a hydrogen atom or methyl group and X represents a hydroxylamino or amino group, Which comprises treating in a liquid medium a 5-nitro-1,4,4a,9a-tetrahydroanthraquinone represented by the general formula II ##EQU2## where, in the general formula, R.sub.1 and R.sub.2 represent individually a hydrogen atom or methyl group, In the presence of a basic compound with or without a reducing agent.