tetraethylammonium chloride; potassium acetate; palladium diacetate; triphenylphosphine in N,N-dimethyl-formamide T=105°C; Intramolecular Heck cyclization;

potassium acetate; triphenylphosphine; palladium diacetate in argon

potassium acetate; diisopropyl (E)-diazene-1,2-dicarboxylate; triphenylphosphine in tetrahydrofuran; water; ethyl acetate; N,N-dimethyl-formamide

1: diethylazodicarboxylate; triphenylphosphine / tetrahydrofuran / 17.5 h / 0 - 50 °C / |Inert atmosphere 2: triphenylphosphine; palladium diacetate; potassium acetate; tetraethylammonium chloride / N,N-dimethyl-formamide / 16 h / 110 °C / |Inert atmosphere View Scheme

1: With sodium hydrogencarbonate; ozone in methanol; chloroform T=-78°C; 16 h; 2: With dimethylsulfide in methanol; chloroform T=-78 - 20°C; 12 h;

osmium(VIII) oxide; 4-methylmorpholine N-oxide; tert-butyl alcohol in dichloromethane T=20°C;