1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo-[2.2.2]octane bis(tetrafluoroborate); BaO; silver(l) oxide in acetone T=23 - 90°C;

1: 4-BrPhSi(OEt)3 With (IPr)CuF in tetrahydrofuran T=20°C; Inert atmosphere; 2: acetyl chloride in tetrahydrofuran T=20°C; 12 h; Inert atmosphere;