1: 3-phenyl-2-propyn-1-ol (phenyl propargyl alcohol) With n-butyllithium in tetrahydrofuran T=20°C; 0.5 h; 2: carbon dioxide in tetrahydrofuran T=0 - 20°C; 1.5 h; 3: 3-chloroprop-1-ene With dichloro bis(acetonitrile) palladium(II) in tetrahydrofuran T=20°C; 3 h;

dichloro bis(acetonitrile) palladium(II) in tetrahydrofuran 2 h; Ambient temperature; Yield given;