Method for preparing a bicyclic guanidine and its derivatives
AssigneeHelsingin Yliopisto
InventorsJussi Helminen, Alistair King, Ilkka Kilpeläinen
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Abstract
The present invention relates to a method of producing a bicyclic guanidine and its derivatives. In particular, the present invention relates to a method of producing triazabicyclodecene (TBD) and its derivatives, particularly alkyl derivatives, such as methyl triazabicyclodecene (MTBD), and MTBD-derived ionic liquids. The invention also relates to the use of said compounds in cellulose dissolution and subsequent processing.
Claims21
A method for preparing a bicyclic guanidine in base form or a derivative of the bicyclic guanidine comprising contacting a cyanamide and a polyamine at an elevated temperature to cause said cyanamide to react with said polyamine, wherein the method is essentially free of added solvents and yields the bicyclic guanidine in base form or a derivative of the bicyclic guanidine.
A method for preparing 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) or a derivative of TBD comprising the step of contacting dicyandiamide with bis(3-aminopropyl)amine in a bis(3-aminopropyl)amine solution at a temperature of at least 150° C. to cause said dicyandiamide to react with said bis(3-aminopropyl)amine to yield the TBD in base form or a derivative of TBD.
21-23. (canceled)
Dependencies are inferred from the claim text.