1: 98 percent / sodium hydride / benzene / 12 h / Ambient temperature 2: 100 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / Ambient temperature 3: 100 percent / triethylamine / benzene / 2 h / Ambient temperature 4: acetonitrile / 36 h / 65 - 70 °C View Scheme

1: 98 percent / sodium hydride / benzene / 12 h / Ambient temperature 2: 100 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / Ambient temperature View Scheme

tetrabutyl ammonium fluoride in tetrahydrofuran 2 h; Ambient temperature;

Multi-step reaction with 3 steps 1: 98 percent / sodium hydride / benzene / 12 h / Ambient temperature2: 100 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / Ambient temperature3: 100 percent / triethylamine / benzene / 2 h / Ambient temperature