in tetrahydrofuran T=0 - 20°C; 24 h;

toluene-4-sulfonic acid in methanol 6 h;

1: 4-allyl-1,2-methylenedioxybenzene With 2,3-dicyano-5,6-dichloro-p-benzoquinone in 1,4-dioxane 0.416667 h; HeatingMicrowave irradiation; 2: methanol With 2,3-dicyano-5,6-dichloro-p-benzoquinone in 1,4-dioxane 0.5 h; HeatingMicrowave irradiation;

1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,4-dioxane / 0.42 h / Heating; Microwave irradiation 2: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,4-dioxane / 0.5 h / Heating; Microwave irradiation View Scheme

2,3-dicyano-5,6-dichloro-p-benzoquinone in 1,4-dioxane 0.5 h; HeatingMicrowave irradiation;

hydrogen; palladium on activated charcoal in methanol 6 h;