silicon tetrafluoride in acetonitrile T=16°C; 6 h;

trimethylsilyl trifluoromethanesulfonate in dichloromethane T=14°C; 70 h;

1: octane-1-acetic acid With pyridine in tetrahydrofuran T=0°C; 0.5 h; 2: chloro-trimethyl-silane With 1,1,1,3,3,3-hexamethyl-disilazane in tetrahydrofuran T=0 - 20°C; 12 h;

pyridine T=70°C; 1 h;