2,2,6,6-tetramethyl-piperidine; n-butyllithium in tetrahydrofuran; hexane 1.) -30 deg C, 1 h, 2.) -78 deg C, 2 h;

sodium methylate in tetrahydrofuran 2 h; Ambient temperature;

1: 3-diphenylphosphinoyl-butan-2-one With lithium diisopropyl amide in tetrahydrofuran T=0°C; 0.25 h; 2: 1-[(E)-3-bromo-1-propenyl]benzene in tetrahydrofuran T=-78°C; 6 h; Further stages.;