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. 11, 1997
Filed:
Mar. 16, 1995
Applicant:
Inventors:
Richard W Draper, North Caldwell, NJ (US);
Eugene J Vater, Lyndhurst, NJ (US);
Assignee:
Schering Corporation, Kenilworth, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
540 61 ; 540 63 ; 540 69 ; 540 70 ; 540114 ; 540115 ; 540116 ; 540118 ; 540119 ; 552564 ; 552565 ; 552567 ; 552568 ; 552569 ; 552580 ; 552581 ;
Abstract
Disclosed is a process for producing a compound of the formula: ##STR1## by reacting a compound of the formula: ##STR2## with: (1) a chlorinating reagent selected from an N-chloroimide or an N-chloroamide; (2) an anhydrous strong acid selected from orthophosphoric acid, alkylsulfonic acids, fluoroalkylsulfonic acids or arylsulfonic acids; and (3) anhydrous dimethyl formamide; at a temperature within the range of about -78.degree. to about 0.degree. C., under anhydrous conditions under an inert atmosphere.