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:
May. 31, 1994
Filed:
Oct. 22, 1992
Applicant:
Inventors:
Jaroslav Kalvoda, Binningen, CH;
Martin Kessler, Hausgauen, FR;
Rene Lattmann, Binningen, CH;
Gerardo Ramos, Arlesheim, CH;
Assignee:
Ciba-Geigy Corp., Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07B / ;
U.S. Cl.
CPC ...
540357 ; 540200 ; 549548 ; 435121 ;
Abstract
Compounds of the formula ##STR1## in which R.sub.1 is hydrogen or lower alkyl, R.sub.2 is hydrogen or a hydroxyl protective group R.sub.2 ' and R.sub.3 is substituted or unsubstituted phenyl or lower alkyl can be prepared in a three-stage process from readily accessible .beta.-lactam starting materials.