1: 96 percent / p-toluenesulfonic acid, 4-A sieves / CH2Cl2 / 48 h / Heating 2: 1.) n-butyllithium, TMEDA / 1.) ether, hexane, -20 deg C, 1 h, 2.) 1 h 3: 1.) POCl3 / 1.) 0 deg C, 2.) 60 deg C - 70 deg C, 3 h View Scheme

trichlorophosphate 1.) 0 deg C, 2.) 60 deg C - 70 deg C, 3 h; Yield given. Multistep reaction;