One step method for the preparation of difurfuryl diamines
AssigneeThe United States Department of Agriculture as represented by the Secretary of Agriculture
InventorsAnthony H. Conner, Michael S. Holfinger, Charles G. Hill, Jr., William J. McKillip, Rolf H. Reimann
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Abstract
A synthetic procedure for the synthesis of diamino difurfuryl compounds via a one-step, low-temperature reaction that does not require additional steps for the protection of the amino functionalities in the reactant or the deprotection of the amino functionalities in an intermediate product to give the final product is disclosed. The importance of acid concentration, reaction temperature, and reaction time to the one step method are disclosed.
Claims14
A one step method for the production of difurfuryl diamines comprising:
- reacting unprotected furfurylamine with a carbonyl-containing compound in the presence of a catalyst wherein said furfurylamine to said catalyst is in a weight:weight ratio ranging from 0.1:1 to 20:1, wherein the concentration of said catalyst is between 0.1N to 16N, wherein said one step method is performed at temperature ranges from -10.degree. C. to 100.degree. C., and wherein the reaction time ranges from 0.1 minute to 48 hours.
Dependencies are inferred from the claim text.