US Patent 7405319 Process for the preparation of carbamates

Patent 7405319 was granted and assigned to Council of Scientific and Industrial Research on July, 2008 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

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Council of Scientific and Industrial Research

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

74053190

Patent Inventor Names

Rajendra Srivastava0

Darbha Srinivas0

Paul Ratnasamy0

Date of Patent

July 29, 2008

Patent Application Number

114378590

Date Filed

May 22, 2006

Patent Primary Examiner

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Yvonne Eyler

Patent abstract

The present invention provides an improved process for the preparation of carbamates with high selectivity of pharmaceutical interest by an eco-friendly, non-toxic, phosgene-/isocyanate-/CO-free clean route through a reaction of amine, organic halide compound and carbon dioxide in the presence of a solid, reusable catalyst at moderate conditions and does not require additional cocatalyst/promoter as well as solvent.

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