1: phenylacetylene With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.25 h; 2: 2-{[3-(4-chlorophenyl)prop-2-yn-1-yl]oxy}-N-methyl-N-methoxyacetamide in tetrahydrofuran; hexane T=-78 - 20°C;