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:
Jun. 02, 1987
Filed:
Mar. 14, 1985
Applicant:
Inventors:
Gordon D Gruetzmacher, Gales Ferry, CT (US);
Robert A Volkmann, Ledyard, CT (US);
Assignee:
Pfizer Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548303 ; 548147 ; 548154 ;
Abstract
A process for the preparation of a thieno-imidazole derivative, particularly descarboxybiotin, a useful intermediate for the preparation of d-biotin, which comprises reacting a thio-substituted intermediate, for example descarboxythiobiotin, with an epoxy compound in an alkanol solvent; and a process for the preparation of said intermediate by reacting a substituted imidazothiazole alcohol with anhydrous hydrogen fluoride.