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. 10, 1997
Filed:
May. 28, 1996
Hubert Maehr, Wayne, NJ (US);
Hoffmann-La Roche Inc., Nutley, NJ (US);
Abstract
The invention relates to a process of making a compound of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 and n are as described herein, and, when R.sub.1 is different from R.sub.2, and/or when R.sub.3 is different from R.sub.4, enantiomers, diastereomers and racemates thereof, and salts thereof with pharmaceutically acceptable bases. The method comprises reacting a compound of the formula ##STR2## wherein R.sub.5 and n are as described herein with a compound of the formula ##STR3## to produce a compound of the formula ##STR4## wherein n is as described herein, and converting a compound of formula IV to a compound of formula I.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile