Arrhenius parameters were measured for the methoxy-lechlorination reactions of some chloroderivatives of isoxazolo[4,5-c]- and [5,4-b]pyridine. A comparison of these results with the kinetic data for the corresponding chloropyridines shows that fusion of the isoxazole ring with the pyridine ring strongly increases the reactivity of the 4- and 6-positions toward nucleophilic substitution.
测量了
异恶唑啉[4,5- c ]-和[5,4- b ]
吡啶的一些
氯衍
生物的甲氧基-
氯氯化反应的阿累尼乌斯参数。将这些结果与相应的
氯吡啶的动力学数据进行比较,结果表明,
异恶唑环与
吡啶环的融合极大地提高了4位和6位对亲核取代的反应性。