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. 21, 1996
Filed:
Oct. 20, 1993
Applicant:
Inventors:
Richard C Effland, Bridgewater, NJ (US);
Larry Davis, Sergeantsville, NJ (US);
Gordon E Olsen, Somerset, NJ (US);
Assignee:
Hoechst Marion Roussel Inc., Somerville, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544105 ;
Abstract
This application relates to a process for the preparation of indolylpyridooxazines of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are as defined in the specification which comprises cyclizing compound of the formula ##STR2## in the presence of a strong base such as sodium hydride or potassium t-butoxide.