sodium carbonate; palladium diacetate; triphenylphosphine in dimethyl-ether; water 24 h;

1: With hydrogenchloride in water; acetonitrile T=170°C; Diels-Alder Cycloaddition; 5 h; Inert atmosphereMicrowave irradiation; 2: With oxygen in water; acetonitrile T=20°C; 0.5 h; UV-irradiation; Reagent/catalystTime;

hydrogenchloride in water; acetonitrile T=170°C; Diels-Alder Cycloaddition; 5 h; Inert atmosphereMicrowave irradiation;

in tetrahydrofuran 96 h;