1: methyl bromide With iodine; magnesium in tetrahydrofuran T=20°C; 6 h; Inert atmosphereSchlenk technique; 2: (1H-benzo[d][1,2,3]triazol-1-yl)(3,5-di-tert-butyl-2-hydroxyphenyl)methanone in tetrahydrofuran T=25°C; 15 h; Inert atmosphereSchlenk technique; 3: With water; ammonium chloride in tetrahydrofuran Cooling with iceInert atmosphereSchlenk technique;

manganese(IV) oxide in hexane 16 h; Heating;

sec.-butyllithium in tetrahydrofuran; diethyl ether; hexane T=-95 - -78°C; 1 h;

in tetrahydrofuran T=-78 - 20°C;

in diethyl ether T=0 - 20°C;

1: 2,4-di-tert-butylphenol With titanium tetrachloride T=20°C; 2: acetyl chloride T=20 - 120°C; 1.25 h;

in tetrahydrofuran T=20°C; 2 h;

1: 100 percent / diethyl ether / 16 h / Heating 2: 96 percent / MnO2 / hexane / 16 h / Heating View Scheme

1: 70 percent / CH3COOH 2: 58 percent / diethyl ether / 0 - 20 °C View Scheme

in diethyl ether 16 h; Reflux;