Design of hetarylthiofuroxans by nucleophilic substitution of NO2 group in nitrofuroxans

Hetarylthiofuroxans were synthesized by nucleophilic substitution of the nitro group in 4-nitrofuroxans under the action of hetarylthiols in the DBU-MeCN system at room temperature, reactivity of 4-nitrofuroxans being dependent on the C(3)-substituent.