A general, highly effective two-step approach for direct synthesis of (1H-tetrazol-5-yl)furoxan ammonium salts with various functional substituents based on initial effective synthesis of cyanofuroxans by dehydration of furoxancarboxylic acid amides by the action of (CF₃CO)₂O/Py followed by [3+2]-cycloaddition of cyanofuroxans to ammonium azide, generated in situ from TMSN₃ and NH₄F, has been developed.

中文翻译：

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通过两步脱水/ [3 + 2]-环加成策略有效获得（1H-四唑-5-基）呋喃喃铵盐

一种一般高效的两步法，可直接合成具有各种功能性取代基的（1H-四唑-5-基）呋喃喃铵盐，其基础是通过（CF ₃ CO）的作用使呋喃呋喃羧酸酰胺脱水而初始有效合成氰呋喃类化合物。）已开发出₂ O / Py，然后由TMSN ₃和NH ₄ F原位生成氰呋喃类化合物到叠氮化铵的[3 + 2]-环加成反应。