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:
Sep. 21, 1976
Filed:
Jan. 22, 1975
Applicant:
Inventors:
Takeaki Umemura, Takarazuka, JA;
Fukashi Horiuchi, Kawani, JA;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07B / ; C07C / ;
U.S. Cl.
CPC ...
2605 / ; 260D / ;
Abstract
A process is provided for preparing racemic allethrolone which comprises reacting (-) allethrolone with phosphorus chloride compounds in the presence of a Lewis acid, and hydrolyzing the racemic 4-chloro-allethrone thus obtained.