in N,N-dimethyl-formamide Ambient temperature;

1.) THF, ether, 20 deg C, 30 min, 2.) THF, ether, a) 0 deg C 30 min, b) 20 deg C, 5 h; Yield given. Multistep reaction;

in tetrahydrofuran; diethyl ether 4 h; Heating; Yield given;

1: 1-(n-octanoyl)benzotriazole With lithium hexamethyldisilazane in tetrahydrofuran T=-95°C; 0.5 h; 2: (S)-3-(tert-butyldimethylsilyloxy)tetradecanal in tetrahydrofuran T=-95 - 0°C;