Hydrochloric Acid → 6-[4-(1-Imidazolyl)benzyl]-6-(3,5,6-trimethyl-1,4-benzoquinon-2-yl)hexanoic acid

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Reaction Conditions

Reaction Steps

In acetic acid (35 ml) was dissolved 3.50 g (8.06 mmole) of methyl 6-[4-(1-imidazolyl)benzyl]-6-(3,5,6-trimethyl-1,4-benzoquinon-2-yl)hexanoate, and concentrated hydrochloric acid (16.1 ml) was added to the solution, followed by stirring at 100° C. for 1 hour. The solvent was distilled off, and acetone was added to the residue, followed by concentration under reduced pressure. The residue was chromatographed on a silica gel column, and elution was performed with chloroform/methanol (6:1). The fractions containing the object compound were collected and concentrated under reduced pressure, and the residue was crystallized to give 2.94 g (87%) of 6-[4-(1-imidazolyl)benzyl]-6-(3,5,6-trimethyl-1,4-benzoquinon-2-yl)hexanoic acid.

Provenance & Evidence