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Synthesis of acid addition salt of delta-aminolevulinic acid from 5-bromo levulinic acid esters

United States Patent

June 24, 2003
View the Complete Patent at the US Patent & Trademark Office
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BioRenewable Chemicals and Solvents
A process of preparing an acid addition salt of delta-aminolevulinc acid comprising: a) dissolving a lower alkyl 5-bromolevulinate and hexamethylenetetramine in a solvent selected from the group consisting of water, ethyl acetate, chloroform, acetone, ethanol, tetrahydrofuran and acetonitrile, to form a quaternary ammonium salt of the lower alkyl 5-bromolevulinate; and b) hydrolyzing the quaternary ammonium salt with an inorganic acid to form an acid addition salt of delta-aminolevulinic acid.
Moens; Luc (Lakewood, CO)
Midwest Research Institute (Kansas City, MO)
09/ 691,474
October 18, 2000
The United States Government has rights in this invention under Contract No. DE-AC36-83CH10093 between the United States Department of Energy and the National Renewable Energy Laboratory, a Division of the Midwest Research Institute.