Nickel-Catalyzed Azide–Alkyne Cycloaddition To Access 1,5-Disubstituted 1,2,3-Triazoles in Air and Water
作者:Woo Gyum Kim、Mi Eun Kang、Jae Bin Lee、Min Ho Jeon、Sungmin Lee、Jungha Lee、Bongseo Choi、Pedro M. S. D. Cal、Sebyung Kang、Jung-Min Kee、Gonçalo J. L. Bernardes、Jan-Uwe Rohde、Wonyoung Choe、Sung You Hong
DOI:10.1021/jacs.7b06338
日期:2017.9.6
Herein, we report a method to access 1,5-disubstituted 1,2,3-triazoles using a Cp2Ni/Xantphos catalytic system. The reaction proceeds both in water and organic solvents at room temperature. This protocol is simple and scalable with a broad substrate scope including both aliphatic and aromatic substrates. Moreover, triazoles attached with carbohydrates or amino acids are prepared via this cycloaddition
过渡金属催化或无金属的叠氮化物-炔烃环加成是获得1,4-或1,5-二取代的1,2,3-三唑的方法。尽管通过铜催化的环加成反应获得1,4-二取代产物已应用于生物分子反应系统,但由于底物范围有限,在水和环境条件下,叠氮化物-炔烃的环加成反应仍可用于获得互补的1,5-区域异构体。对湿气/空气敏感的催化剂。在这里,我们报告一种使用Cp 2访问1,5-二取代1,2,3-三唑的方法Ni / Xantphos催化系统。反应在室温下在水和有机溶剂中进行。该协议是简单且可扩展的,具有广泛的底物范围,包括脂肪族和芳香族底物。此外,通过该环加成反应制备了与碳水化合物或氨基酸连接的三唑。