On the application of the extended Fujita–Nishioka equation to polysubstituted systems. A kinetic study of the rearrangement of several poly-substituted Z-arylhydrazones of 3-benzoyl-5-phenyl-1,2,4-oxadiazole into 2-aryl-4-benzoylamino-5-phenyl-1,2,3-triazoles in dioxane/water
作者:Francesca D'Anna、Fiammetta Ferroni、Vincenzo Frenna、Susanna Guernelli、Camilla Zaira Lanza、Gabriella Macaluso、Vitalba Pace、Giovanni Petrillo、Domenico Spinelli、Raffaella Spisani
DOI:10.1016/j.tet.2004.10.054
日期:2005.1
or penta-substituted Z-arylhydrazones of 3-benzoyl-5-phenyl-1,2,4-oxadiazole (1a–18a) into the relevant 2-aryl-4-benzoylamino-5-phenyl-1,2,3-triazoles (1b–18b) have been determined in 1:1 (v:v) dioxane/water in a wide range of pS+ (3.80–12.50) at different temperatures. The kinetic data obtained have been correlated with those previously collected for the rearrangement of ortho-, meta- and para-substituted
3-苯甲酰基-5-苯基-1,2,4-恶二唑(1a – 18a)的几个二,三,四或五取代的Z-芳基hydr重排成相关的2-芳基-4-的重排率苯甲酰氨基-5-苯基-1,2,3-三唑(1b – 18b)已在不同温度下在1:1 p(v:v)二恶烷/水中以较大的p S +(3.80–12.50)测定。获得的动力学数据已与先前收集的用于重排邻,间和对位取代的Z-芳基azo(19a – 38a)的数据相关。)通过藤田和西冈提出,从而在考虑空间位线性自由能关系(LFER)的延伸的装置(Ë小号)和场(˚F ø在除了正常的电子效应)邻近效应(σ邻,间, p)。良好的相关系数被计算出(- [R ≥0.999),具有易感性常数(ρ,δ和˚F)接近先前对所获得的那些19A - 38A,当仅不包括数据的2,6-双-邻-取代的ž -arylhydrazones 11a和16 –图18a显示了比可预见的高得多的反应性,证