n-butyllithium; ammonium acetate; acetic acid; 1,1,1,3,3,3-hexamethyl-disilazane 1. THF, hexanes, -70 deg C 2. 1.5 h, 60-65 deg C; Yield given. Multistep reaction;

sodium hydride 1.) THF, from -18 to -10 deg C, 2.) THF, reflux, 1 h; Yield given. Multistep reaction;