1: 1,3,5-trimethyl-benzene With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in hexane T=-78 - 20°C; 25 h; Inert atmosphere; 2: chloro-trimethyl-silane in hexane T=-78°C; Inert atmosphere;

titanium; zirconium in tetrahydrofuran; ethylene glycol dimethyl ether T=25°C; 3 h; Yield givenYields of byproduct given. Title compound not separated from byproducts;

lt;Mg(anthracene)(THF)3gt; 1.) THF, 20 deg C, 1 h, 2.) THF; Yield given. Multistep reaction;

n-butyllithium; potassium 2-methyl-2-butoxide 1) hexane, 16 h, r.t.; 6 h, reflux, 2) hexane, -78 deg C; r.t., 20 h; Yield given. Multistep reaction;