n-butyllithium; 1,2,2-trichloro-1,1,2-trichloro-ethane 1.) ether, hexane, 25 deg C, 24 h, 2.) ether, hexane, -40 deg C, 1 h; Yield given. Multistep reaction;

1: N-lt;(S)-1-phenylethylgt;(trimethylsilyl)amine With n-butyllithium in diethyl ether; hexane T=-35 - 20°C; 2: chloro-diphenylphosphine in diethyl ether; hexane T=-35 - 20°C; 7 h;