Oxodiazonium ion generation 5. 3-(N-Nitroamino)-4-phenylfuroxan: synthesis and reactivity
作者:V. P. Zelenov、A. A. Voronin、A. M. Churakov、M. S. Klenov、Yu. A. Strelenko、V. A. Tartakovsky
DOI:10.1007/s11172-012-0048-z
日期:2012.2
3-(N-Nitroamino)-4-phenylfuroxan, the first representative of the furoxan series that contains the N-nitroamino group in position 3 of the furoxan ring, was obtained. This compound is not very stable; its structure was confirmed by chemical transformations into an ammonium salt and N- and O-methyl derivatives. Under standard conditions for oxodiazonium ion generation from nitramine, 3-(N-nitroamino)-4-phenylfuroxan underwent a transformation into the corresponding azofuroxan, viz., 3,3′-diazenediylbis(4-phenyl-1,2,5-oxadiazole 2-oxide), while the O-methyl derivative of 3-(N-nitroamino)-4-phenylfuroxan yielded 2-hydroxyimino-2-phenylacetonitrile. The changed reactivity of the oxodiazonium ion was explained by its intramolecular interaction with the exocyclic O atom of the furoxan system.
我们获得了 3-(N-硝基氨基)-4-苯基呋喃酮,这是呋喃酮系列中第一个在呋喃酮环的第 3 位含有 N-硝基氨基的代表化合物。这种化合物并不十分稳定;其结构通过化学转化为铵盐以及 N-和 O-甲基衍生物得到了证实。在由硝胺生成草酰二氮离子的标准条件下,3-(N-硝基氨基)-4-苯基呋喃环转化为相应的偶氮呋喃,即 3,3′-二氮二基双(4-苯基-1,2,5-恶二唑 2-氧化物),而 3-(N-硝基氨基)-4-苯基呋喃环的 O-甲基衍生物则生成 2-羟基亚氨基-2-苯基乙腈。氧二氮离子的反应性发生变化的原因是它与呋喃体系的外环 O 原子发生了分子内相互作用。