Patent 7572918 was granted and assigned to Theravance on August, 2009 by the United States Patent and Trademark Office.
Processes and intermediates for preparing substituted 4-amino-1-(pyridylmethyl)-piperidine and related compounds in high yield and high purity are described. The substituted 4-amino-1-(pyridylmethyl)piperidine and related compounds prepared by the described processes are useful as muscarinic receptor antagonists.