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:
Nov. 01, 1988
Filed:
Oct. 01, 1987
Applicant:
Inventor:
Constantine Sklavounos, Waterford, CT (US);
Assignee:
Pfizer Inc., New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548303 ;
Abstract
In the synthesis of biotin and decarboxybiotin, a more direct method for the conversion of 1,3-diacyl-4-(bromomethyl)-5-[(5-alkoxycarbonylpentanoyl) or hexanoyl]-4-imidazolin-2-ones to 1,3-diacyl-4-[(4-alkoxybutanoyl) or pentanoyl]-1H,3H-thieno (3,4-b)imidazol-2-one via the Bunte salt of the formula ##STR1## wherein R is (C.sub.1 -C.sub.5)alkanoyl or (C.sub.2 -C.sub.5) alkoxycarbonyl, X is methyl or (C.sub.2 -C.sub.5)alkoxycarbonyl an Y is an alkali metal.
Sklavounos, Constantine. (1988). Process for biotin intermediates (U.S. Patent No. 4782165). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4782165
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile