1: 2-methyl-but-3-yn-2-ol With 1,8-diazabicyclo[5.4.0]undec-7-ene in acetonitrile T=0°C; 0.5 h; 2: 6-hydroxy-quinoline With trifluoroacetic anhydride; copper(l) chloride in acetonitrile T=0°C; 3 h;