1: 3-Methylpyridine With n-butyllithium; LiDMAE in hexane T=0°C; Metallation; 1 h; 2: chloro-trimethyl-silane in tetrahydrofuran; hexane T=-78°C; Substitution; 1 h; Further stages.;

iodine; magnesium in tetrahydrofuran T=70°C; 1 h;