triethylamine; calcium chloride in ethanol Microwave; Reactivity (does not react);

1: 92 percent / tetrahydrofuran; diethyl ether / 0.33 h / 0 °C 2: 77 percent / manganese dioxide / CH2Cl2 / 16 h / Ambient temperature 3: 28 percent / selenium dioxide, 80percent tert-butyl hydroperoxide / CH2Cl2 / 2 h / 0 deg C to r.t. 4: 75 percent / triphenylphosphine, imidazole, I2 / diethyl ether; acetonitrile / 0.5 h / 0 °C 5: tributyltin hydride, azoisobutyronitrile (AIBN) / benzene / 3 h / Heating View Scheme

phenyllithium in tetrahydrofuran; diethyl ether; cyclohexane T=20°C; Wittig methylenation; 1 h;

sodium hexamethyldisilazane in tetrahydrofuran 2 h; Ambient temperature;

in tetrahydrofuran

boron trifluoride diethyl etherate 1.) THF, from -78 deg C to RT, 2.5 h, 2.) THF, reflux, 2 h; Yield given. Multistep reaction;