1: 9,10-Dibromoanthracene With tert.-butyl lithium in tetrahydrofuran T=-69°C; 3 h; 2: chloro-trimethyl-silane in tetrahydrofuran T=-69°C; 3 h;

n-butyllithium 1.) ether, pentane, 20 deg C, 45 min, 2.) ether, THF, 20 deg C, 20 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

n-butyllithium 1.) ether, 20 deg C, 30 min, 2.) ether, THF, 20 deg C, 30 min; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;