Generation of oxodiazonium ions 1. Synthesis of [1,2,5]oxadiazolo[3,4-c]cinnoline 5-oxides
作者:M. S. Klenov、M. O. Ratnikov、A. M. Churakov、V. N. Solkan、Yu. A. Strelenko、V. A. Tartakovsky
DOI:10.1007/s11172-011-0084-0
日期:2011.3
Methods for the synthesis of [1,2,5]oxadiazolo[3,4-c]cinnoline 5-oxides, which include the reaction of 3-nitramino-4-(R-phenyl)furazans or their O-methyl derivatives with electrophilic agents, have been developed. Unsubstituted [1,2,5]oxadiazolo[3,4-c]cinnoline 5-oxide was synthesized from 3-nitramino-4-phenylfurazan upon the action of phosphorus anhydride or oleum, as well as from O-methyl derivative
[1,2,5]恶二唑并[3,4-c]肉啉5-氧化物的合成方法,包括3-硝基氨基-4-(R-苯基)呋喃或它们的O-甲基衍生物与亲电子的反应代理,已开发。未取代的[1,2,5]恶二唑并[3,4-c]cinnoline 5-氧化物由3-硝基-4-苯基呋咱在磷酐或发烟硫酸的作用下合成,以及由3-的O-甲基衍生物合成。硝基氨基-4-苯基呋喃对 H2SO4、MeSO3H、CF3CO2H 和 BF3·Et2O 的作用,而 6-、7-、8-和 9-硝基取代的 [1,2,5]恶二唑并[3,4-c] cinnoline 5-oxides — 在 H2SO4-HNO3 硝化混合物的作用下,来自相应的 3-nitramino-4-(nitrophenyl)furazans。有人提出,在这些反应中,硝胺或其 O-甲基衍生物在亲电子试剂的作用下会形成氧重氮离子,进一步参与芳基亲电芳香取代(SEAr)的分子内反应。[1