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:
Oct. 29, 1996
Filed:
Jan. 12, 1995
Applicant:
Inventors:
Heinrich Schneider, Ingelheim am Rhein, DE;
Albrecht Christmann, Ingelheim am Rhein, DE;
Assignee:
Boehringer Ingelheim KG, Ingelheim am Rhein, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540495 ;
Abstract
A process for preparing nevirapine which comprises reacting 2-chloro-N-(2-chloro-4-methyl-3-pyridyl)-3-pyridine carboxamide with cyclopropylamine followed by cyclisation of the product, wherein the reaction with cyclopropylamine is carried out in the presence of an oxide or hydroxide of an element of the second main or sub-group of the periodic table of elements.