N,N,N',N',N'',N''-hexamethylphosphoric triamide; potassium hexamethylsilazane 1.) DMF, THF, -78 deg C, 2 h; 2.) DMF, THF, 20 min, r.t.; Yield given. Multistep reaction. Yields of byproduct given;

(i) iPr2NLi, (ii) /BRN= 1209232/; Multistep reaction;

(i), (ii) Et3N*HF; Multistep reaction;