aluminium trichloride in ice-water; benzene

aluminium trichloride T=10°C; 6 h;

1: 4-oxo-4H-1-benzopyran With (2,2,6,6-tetramethylpiperidine)2Zn·2MgCl2·2LiCl in tetrahydrofuran T=-30°C; 1 h; Inert atmosphere; 2: With CuCN*2LiCl2 in tetrahydrofuran T=-40°C; 0.5 h; Inert atmosphere; 3: benzoyl chloride in tetrahydrofuran T=-40 - -10°C; 2 h; Inert atmosphere; regioselective reaction;

water; acetic acid; 2,3-dicyano-5,6-dichloro-p-benzoquinone in 1,4-dioxane 4 h; Reflux;

1,4-dioxane; selenium(IV) oxide

1: sodium hydride; pyridine / Behandeln des Reaktionsprodukts mit wss. Salzsaeure 2: chromium (VI)-oxide; acetic acid View Scheme

1: sodium hydride; pyridine / Behandeln des Reaktionsprodukts mit wss. Salzsaeure 2: chromium (VI)-oxide; acetic acid View Scheme