1: in tetrahydrofuran T=0°C; 0.166667 h; Inert atmosphereSealed tube; 2: With tetrabutyl ammonium fluoride in tetrahydrofuran T=0 - 20°C; Inert atmosphereSealed tube; 3: With tetrabutyl ammonium fluoride; water in tetrahydrofuran T=0 - 20°C; Inert atmosphereSealed tube;

zinc in pyridine P=1520 - 2660 Torr; 4 h;

2,6-dimethylpyridine; oxoammonium salt in dichloromethane T=20°C; Sealed tube;