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. 26, 1985
Filed:
Mar. 02, 1983
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2603515 ; 2603511 ; 260376 ; 260383 ;
Abstract
A process for preparing racemic 4-demethoxy-7-deoxydaunomycinone which comprises methylating an optically active .alpha.-hydroxyketone to give the corresponding methylated product of either one of the formulas: ##STR1## and reacting the latter with an acid to give a racemate of the .alpha.-hydroxyketone of the formula: ##STR2## .