CuBr-NCS was found to be a mild and efficient reaction system to promote the multicomponent azide-alkyne cycloaddition reactions. Under the reaction conditions, terminal alkynes and azides can react smoothly at ambient temperature to give the target products 5-bromo-1,4-disubsituted-1,2,3-triazoles in moderate to good yields with a wide tolerance of other sensitive functional groups. The further successful application of the CuBr-NCS reaction system in sugar and cyclic adenosine 5′-diphosphoribose (cADPR) analogues illustrated the value of this method in the synthesis of designed biomolecules.
研究发现,CuBr-
NCS 是促进多组分
叠氮-炔环化反应的温和而高效的反应体系。在该反应条件下,末端
炔烃和
叠氮化物可在常温下顺利反应,以中等至良好的收率得到目标产物 5-
溴-1,4-二亚基-
1,2,3-三唑,并且对其他敏感官能团具有广泛的耐受性。CuBr-
NCS 反应体系在糖和环
腺苷 5′-二
磷酸核糖 (c
ADPR) 类似物中的进一步成功应用,说明了这种方法在合成设计
生物大分子中的价值。