New facile synthesis of N-sulfinylamine derivatives using N,N′-sulfinylbisimidazole and N-(chlorosulfinyl)imidazole

Treatment of amine derivatives such as amines, sulfonamides, and amides with N,N′-sulfinylbisimidazole 1 and N-(chlorosulfinyl)imidazole 2 in situ respectively gives the corresponding N-sulfinylamine derivatives (3); the latter reaction using N-(chlorosulfinyl)imidazole 2 yields 3 in almost quantitative yields at 20°C under mild conditions.