Synthesis of Carbamate or Urea Compounds
AssigneeNederlandse Organisatie voor toegepast-natuurwet- enschappelijk onderzoek TNO
InventorsAntonius Eduard Dominicus Maria VAN DER HEIJDEN, Erik VAN GEEST, Jos Johan Matthijs Hugo VAN DEN ELSHOUT
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Abstract
The invention pertains to the synthesis of carbamate and urea compounds. In particular the invention is directed to the synthesis of carbamate and urea compounds which may be used in the production of compounds that are used to stabilize nitrocellulose. The method of the invention comprises preparing a carbamate or urea derivative comprising reacting an amine and a carbonate or carbamate in the presence of an ionic liquid.
Claims12
Method for preparing a carbamate or urea derivative according to formula I, comprising reacting an amine according to formula II and a carbonate or carbamate according to formula III, in the presence of a catalyst
- wherein
- Ar1 is an aryl that is optionally substituted with one or more halide, alkoxy, alkyl, nitro, sulfonate, ester, amide and/or carboxylate;
- Ar2 is Ar1 or an aryl that is optionally substituted with one or more halide, alkoxy, alkyl, nitro, sulfonate, ester, amide and/or carboxylate;
- X is an alkoxy, aryloxy or an amine and is optionally substituted with one or more halide, alkoxy, alkyl, nitro, sulfonate, ester, amide and/or carboxylate;
- and
- LG is a leaving group.
Dependencies are inferred from the claim text.