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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.
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Ферштат et al. (2015) studied this question.
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