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:
Sep. 09, 2008
Filed:
Oct. 25, 2006
Marco Santagostino, Mittelbiberach, DE;
Werner Rall, Mittelbiberach, DE;
Rainer Soyka, Biberach, DE;
Marco Santagostino, Mittelbiberach, DE;
Werner Rall, Mittelbiberach, DE;
Rainer Soyka, Biberach, DE;
Boehringer Ingelheim International GmbH, Ingelheim, DE;
Abstract
A process for making a compound of formula 1 or a salt thereof, wherein: wherein Ris benzyl, diphenylmethyl, or trityl, each optionally substituted at, if available, an aryl group or an aliphatic carbon atom, with a compound of formula 7 or a salt thereof, to obtain a compound of formula 5, or a salt thereof (b) reducing the nitro group of the compound of formula 5 to an amine group and mesylating this amine group and cleaving the protecting group during the reduction step or after the mesylation step to obtain the compound of formula 1.