One-pot nucleophilic substitution–double click reactions of biazides leading to functionalized bis(1,2,3-triazole) derivatives
作者:Hans-Ulrich Reissig、Fei Yu
DOI:10.3762/bjoc.19.101
日期:——
furnished geometrically differing bis(1,2,3-triazole) derivatives. The use of tris[(1-benzyl-1H-1,2,3-triazol-4-yl)methyl]amine (TBTA) as ligand for the click step turned out to be very advantageous. The compounds with 1,2-oxazinyl end groups can potentially serve as precursors of divalent carbohydrate mimetics, but the reductive cleavage of the 1,2-oxazine rings to aminopyran moieties did not proceed
抽象的 将苄基溴与叠氮化钠的亲核取代与随后的铜催化的末端炔烃的 (3 + 2) 环加成反应结合起来。这种一锅法是用简单的炔烃模型开发的,但随后应用于带有对映纯 1,2-恶嗪基取代基的更复杂的炔烃。因此,前体化合物1,2-、1,3-或1,4-双(溴甲基)苯提供了几何上不同的双(1,2,3-三唑)衍生物。使用三[(1-苄基-1H -1,2,3-三唑-4-基)甲基]胺(TBTA)作为点击步骤的配体被证明是非常有利的。具有 1,2-恶嗪基端基的化合物可以潜在地充当二价碳水化合物模拟物的前体,但是这些化合物并没有完全地将 1,2-恶嗪环还原裂解为氨基吡喃部分。 Beilstein J. Org. Chem. 2023, 19, 1399–1407. doi:10.3762/bjoc.19.101