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:
Dec. 13, 2011
Filed:
Aug. 31, 2010
Marc Muller, Wolfersdorf, FR;
Lin Xu, Shanghai, CN;
Marc Muller, Wolfersdorf, FR;
Lin Xu, Shanghai, CN;
Basilea Pharmaceutica AG, Basel, CH;
Abstract
Disclosed is a process for the manufacture of a compound of formula (I) wherein Hal represents fluoro or chloro, and Rand Rrepresent, independently from one another, hydrogen or Hal; in which process a compound of formula (II) is converted to a corresponding alkyl, fluoroalkyl or aryl sulfonic acid ester, which is then reacted with an alkali metal nitrite in the presence of a suitable crown ether in a polar non-nucleophilic solvent at a temperature of −10 to 50° C. to give the compound of formula (I).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile