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:
Jul. 12, 2005
Filed:
Jan. 26, 2004
Applicants:
Hans-wolfram Flemming, Usingen, DE;
Gerhard Korb, Hainburg, DE;
Juergen Mueller-lehar, Weinolsheim, DE;
Walter Weber, Hofheim, DE;
Inventors:
Hans-Wolfram Flemming, Usingen, DE;
Gerhard Korb, Hainburg, DE;
Juergen Mueller-Lehar, Weinolsheim, DE;
Walter Weber, Hofheim, DE;
Assignee:
Aventis Pharma Deutschland GmbH, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D213/38 ; C07D213/53 ;
U.S. Cl.
CPC ...
Abstract
The present invention relates to an efficient process for preparing derivatives of 1-(pyridinyl)-1,1-dialkoxy-2-aminoethane of the formula (I), with which compounds of the formula (I) can be prepared in high purity and yield and in the form of the free base without isolating the acetylpyridine oxime of the formula (XI) which is a critical product from a safety point of view as a solid.