1.1: BuLi / hexane; tetrahydrofuran / 0.25 h / -78 °C 1.2: 78 percent / hexane; tetrahydrofuran / -78 - 20 °C 2.1: 67 mg / acetonitrile / 2 h / Irradiation View Scheme

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