Patent ID: 6399795
Filing Date: 2002-06-04
Classification: C07C

Abstract:
A method for producing 2-(4-methyl-3-pentenyl)anthraquinone (IHEAQ), which comprises carrying out a Diels-Alder addition reaction, wherein naphtho-1,4-quinone is reacted with myrcene [7-methyl-3-methylene-1,6-octadiene] to produce a Diels-Alder adduct which is [2-(4-methyl-3-pentenyl)-1,4,11,12-tetrahydroanthraquinone] and then oxydizing said adduct with an oxygen-containing gas in an organic solvent in the presence of a base, said oxidizing being carried out in a solvent mixture containing a polar and a nonpolar organic solvent in the presence of a strong inorganic base and an organic base.