1,4-dioxane; trichloroacetic acid T=84°C; Schuetteln des Reaktionsprodukts in Aether und Petrolaether mit Ag2O und MgSO4;

in benzene T=100°C; 1 h; Irradiation;

1: 3,7-dimethyl-2,6-octadienyl bromide With samarium diiodide; ditolyl telluride in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 2 h; 2: 2-methyl-1,4-naphthalenedione in benzene T=100°C; 1 h; Irradiation;

1: ditolyl ditelluride With samarium; 1,2-di-iodoethane in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 1 h; 2: 3,7-dimethyl-2,6-octadienyl bromide in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 1.5 h; 3: 2-methyl-1,4-naphthalenedione in benzene T=100°C; 1 h; Photolysis;

boron trifluoride diethyl etherate; silver(l) oxide 1.) CH2Cl2, -78 deg C; Yield given. Multistep reaction;

boron trifluoride diethyl etherate; silver(l) oxide 1.) CH2Cl2, -78 deg C; Yield given. Multistep reaction;