1: tris(1-methylethyl)(prop-1-yn-1-yl)silane With n-butyllithium in tetrahydrofuran; hexane T=-78°C; Metallation; 2.5 h; 2: 2-(Bromomethyl)-1-iodonaphthalene in tetrahydrofuran; hexane T=-78°C; Substitution; 2.5 h;