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. 29, 2008
Filed:
May. 22, 2006
Applicants:
Darbha Srinivas, Maharashtra, IN;
Rajendra Srivastava, Maharashtra, IN;
Paul Ratnasamy, Maharashtra, IN;
Inventors:
Darbha Srinivas, Maharashtra, IN;
Rajendra Srivastava, Maharashtra, IN;
Paul Ratnasamy, Maharashtra, IN;
Assignee:
Council of Scientific and Industrial Research, New Delhi, IN;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 269/00 (2006.01); C07C 259/00 (2006.01);
U.S. Cl.
CPC ...
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.