Synthesis of 2,1-Benzisoxazoles
by Nucleophilic Substitution of Hydrogen in Nitroarenes Activated
by the Azole Ring
作者:Nazariy Pokhodylo、Yuriy Teslenko、Vasyl Matiychuk、Mykola Obushak
DOI:10.1055/s-0029-1216875
日期:——
nitroarenes activated by the azole ring due to their electron-deficient character. Moreover, it was found that annulation of the isoxazole ring occurred regioselectively in disubstituted nitroarenes. In the case of 1-(4-nitrophenyl)-1H-tetrazole, the tetrazole ring cleaved faster than the σH-adduct was formed. 1H-1,2,3-triazole - tetrazole - nucleophilic substitution - 2,1-benzisoxazole - annulation
1-硝基-4-(1,2,3-三唑基/四唑基)苯与芳基乙腈在酒精介质中在过量碱存在下的反应产生了新的2,1-苯并恶唑。这些发现表明由于它们的电子缺陷特性,被唑环活化的硝基芳烃具有高反应活性。此外,发现在二取代的硝基芳烃中区域选择性地发生异恶唑环的环化。在1-(4-硝基苯基)-1-的情况下ħ四唑,四唑环裂解比σ更快ħ形成-adduct。 1 H -1,2,3-三唑-四唑-亲核取代-2,1-苯并恶唑-环化