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:
Feb. 01, 1994
Filed:
May. 06, 1992
Applicant:
Inventor:
Yuji Tahara, Sapporo, JP;
Assignee:
Hoxan Corporation, Sapporo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C / ;
U.S. Cl.
CPC ...
549214 ; 549336 ; 556445 ; 556446 ; 556449 ; 560256 ; 568819 ;
Abstract
There are disclosed novel compounds that can be used to derive therefrom a fragment that corresponds to an A-ring which is to be comined with fragments which respectively correspond to C- and D-rings in synthetic formation of vitamin D.sub.3 derivatives by cleaving the 7,8-bondings by means of oxidizing agents following any known process. According to the invention, there is provided an industrially efficient and effective method of manufacturing above compounds that utilizes chemical reaction of allylic acid to add an oxygen function group to position C(1), a method which is completely different from any existing synthetic methods.