A novel approach to bis(1,3-azol-2-yl)acetonitriles and bis(1,3-azol-2-yl)methanes <i>via</i> the [3 + 2]-dipolar cycloaddition of imidazole <i>N</i>-oxides and 2-heteroaryl-3,3-dimethylacrylonitriles
作者:Anton V. Kutasevich、Anton S. Niktarov、Ekaterina S. Uvarova、Valentina A. Karnoukhova、Vitaly S. Mityanov
DOI:10.1039/d1ob01441b
日期:——
construction of various unsymmetric derivatives based on imidazole, oxazole, thiazole, and 1,3,4-thiadiazole cyclic molecules. Its potential has been demonstrated via the synthesis of 24 diverse derivatives with yields of 29–92%. Bis(1,3-azol-2-yl)acetonitriles can be converted to the corresponding bis(1,3-azol-2-yl)methanes via simple acid hydrolysis followed by subsequent spontaneous decarboxylation
开发了一种新的合成方法,用于获得以前未知的双 (1,3-azol-2-yl) 乙腈和双 (1,3-azol-2-yl) 甲烷。它基于 2-未取代的咪唑N-氧化物和 2-(1,3-azol-2-yl)-3,3-二甲基丙烯腈之间的 1,3-偶极环加成,可通过 (1, 3-azol-2-yl) 乙腈与丙酮。该方法允许构建基于咪唑、恶唑、噻唑和 1,3,4-噻二唑环状分子的各种不对称衍生物。它的潜力已通过合成 24 种不同的衍生物得到证明,产率为 29-92%。双(1,3-azol-2-yl)乙腈可以通过以下途径转化为相应的双(1,3-azol-2-yl)甲烷简单的酸水解,随后以几乎定量的产率自发脱羧。