Highly functionalized regio- and stereoisomers of 1,2,3-triazole-substituted cyclopentanes were prepared in six steps from either bicyclic β-lactam 7 or γ-lactam 23 by 1,3-dipolar cycloaddition of the azido cyclopentanol intermediates with acetylenes. The reactions of azido aminocyclopentanols with non-symmetric acetylenes resulted regioselectively in the corresponding 1,4-disubstitued triazole derivatives under both thermal and Cu(I)-catalysed conditions. These compounds can be regarded as highly functionalized 1,2,3-triazole-modified carbocyclic nucleoside analogues.
通过
叠氮环戊醇中间体与
乙炔的 1,3-二极环加成反应,以双环 β-内酰胺 7 或 γ-内酰胺 23 为原料,分六个步骤制备了 1,2,3- 三唑取代
环戊烷的高官能团和立体异构体。在热催化和 Cu(I) 催化条件下,
叠氮氨基
环戊醇与非对称性
乙炔的反应可选择性地生成相应的 1,4-二取代三唑衍
生物。这些化合物可视为高度官能化的
1,2,3-三唑修饰碳环核苷类似物。