The synthesis of new 2H-1-benzopyran-5,8-quinones has been realized in three steps from p-methoxyphenol with 84-88% overall yield. It consists at first in a regioselective nucleophilic substitution of propargyl alcoholates on an appropriate 4,5-disubstituted o-quinone (obtained by copper-catalyzed oxidation of p-methoxyphenol) and subsequently in a thermal isomerization. Relative stabilities of title compounds are described, as well as several transformation products.