sodium periodate; ammonium acetate; water in acetone T=23°C; 24 h; Inert atmosphere;

1: With sodium hydroxide in methanol T=23°C; 0.25 h; 2: With silver trifluoromethanesulfonate in methanol T=0°C; 0.5 h; 3: With 1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo-[2.2.2]octane bis(tetrafluoroborate) in hexadeuterioacetone 1 h; Molecular sieve;