lithium diisopropyl amide

1.1: Br2 2.1: LDA / tetrahydrofuran 2.2: tetrahydrofuran View Scheme

lithium diisopropyl amide 1.) THF, -78 deg C, 1 h, 2.) -78 deg C, 1 h; -78 deg C -> room temperature, 1 h; Yield given. Multistep reaction;

tellurium 1.) THF, 2.) -78 deg C; Yield given. Multistep reaction;

1: diethyl (phenyltelluromethyl)phosphonate With lithium diisopropyl amide in tetrahydrofuran T=0°C; 0.5 h; 2: phenyl tellurenyl bromide in tetrahydrofuran T=-78 - 0°C; 0.833333 h; 3: cyclohexanone in tetrahydrofuran T=20°C; Horner-Wittig reaction; 2 h;