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US 2002/0120140 A1Published application
Phosgene-free process for preparing carbamates
AssigneePharmacia & Upjohn Company
InventorByung H. Lee
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Abstract
A phosgene-free method for preparing a carbamate from a compound containing an amine group involves reacting the compound with an alkylating agent in the presence of carbon dioxide and cesium carbonate. A reaction can take place under standard pressure and temperature conditions and produces carbamates in a high yield with low by-product formation.
Claims10
In a method for preparing a carbamate from a compound containing an amine group, the improvement comprising reacting the compound with an alkylating agent in the presence of carbon dioxide and cesium carbonate.
Dependencies are inferred from the claim text.