Oxidation of 1,1-disubstituted hydrazines with benzeneseleninic acid and selenium dioxide. Facile preparation of tetrazenes
作者:Thomas G. Back、Russell G. Kerr
DOI:10.1139/v82-390
日期:1982.11.1
1,1-disubstituted hydrazines were oxidized with benzeneseleninic acid in methanol, generally producing the corresponding tetrazenes in high yield. Studies of the by-products of the reaction, of the effects of protic vs. aprotic solvents, and trapping experiments suggest that N-aminonitrenes are unlikely intermediates in this oxidation. An alternative mechanism involving a Pummerer-like reaction of seleninamides
各种 1,1-二取代肼在甲醇中用苯硒酸氧化,通常以高产率产生相应的四氮烯。对反应副产物、质子与非质子溶剂的影响以及捕获实验的研究表明,N-氨基氮烯不太可能是这种氧化的中间体。提出了一种替代机制,涉及衍生自肼的硒酰胺的类似普默勒反应。当肼前体含有芳基或对甲苯磺酰基取代基时,或者当它受到高度阻碍时,四氮苯的形成就会失败。二氧化硒可以代替硒酸用作氧化剂,但在实现高四氮烯产率方面通常不太有效。