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

United States Patent

5,907,058
May 25, 1999
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-aminolevulinic acid comprising: dissolving a lower alkyl 5-bromolevulinate and an alkali metal diformylamide in an organic solvent selected from the group consisting of acetonitrile, methanol, tetrahydrofuran, 2-methyltetrahydrofuran and methylformate or mixtures thereof to form a suspension of an alkyl 5-(N,N-diformylamino) levulinate ester; and hydrolyzing said alkyl 5-(N,N-diformylamino) levulinate with an inorganic acid to form an acid addition salt of delta-amino levulinic acid.
Moens; Luc (Lakewood, CO)
Midwest Research Institute (Kansas City, MO)
09/ 124,489
July 29, 1998
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.