Synthesis of Toddacoumaquinone, a Coumarin-Naphthoquinone Dimer, and Its Antiviral Activities

Abstract

Toddacoumaquinone (1), a coumarin-naphthoquinone dimer, was synthesized through Diels-Alder reaction between 8-(1-acetoxy-3-methyl-1, 3-butadienyl)-5, 7-dimethoxycoumarin (15) and 2-methoxy-1, 4-benzoquinone (5). The activities of 1 against several viruses were examined. A weak activity (EC₅₀=10 μg/ml) was observed against HSV-1 and HSV-2, but no activity was seen against HIV-1.