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:
Mar. 24, 1992
Filed:
Feb. 06, 1990
Applicant:
Inventors:
Masamichi Nakakoshi, Utsunomiya, JP;
Kohji Tamura, Yono, JP;
Makoto Yoshihama, Utsunomiya, JP;
Nobuo Miyata, Utsunomiya, JP;
Assignee:
Snow Brand Milk Products Co., Ltd., Hokkaido, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
20415791 ; 20415793 ; 20415794 ; 552615 ;
Abstract
A process for the preparation in high yield of 14.alpha.-hydroxy-4-androstene-3,6,17-trione which has an aromatase inhibition activity and is useful as an antitumor agent, in which the 6.beta.-hydroxyl group of 6.beta., 14.alpha.-dihydroxy-4-androstene-3,17-dione is selectively oxidized with the aid of visible light energy.