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:
Mar. 03, 2009
Filed:
Jun. 03, 2005
Esa Jarvi, Ballwin, MO (US);
Douglas C. Miller, University City, MO (US);
Frank W. Moser, Arnold, MO (US);
Robert E. Halvachs, Belleville, IL (US);
Esa Jarvi, Ballwin, MO (US);
Douglas C. Miller, University City, MO (US);
Frank W. Moser, Arnold, MO (US);
Robert E. Halvachs, Belleville, IL (US);
Mallinckrodt Inc., Hazelwood, MO (US);
Abstract
An improved process for the preparation of a heteroaryl acetamide from a heteroaryl α-hydroxyacetamide is provided. The process comprises directly hydrogenating the heteroaryl α-hydroxyacetamide in the presence of a strong acid, a halide and a catalyst wherein the molar ratio of the starting heteroaryl α-hydroxyacetamide to water at the initiation of hydrogenolysis is at least about 2:1. In one embodiment, the heteroaryl acetamide is zolpidem and the heteroaryl α-hydroxyacetamide is α-hydroxyzolpidem.