Improved synthesis of 4-amino-7-nitrobenz-2,1,3-oxadiazoles using NBD fluoride (NBD-F)
作者:Michael E. Jung、Timothy A. Dong、Xiaolu Cai
DOI:10.1016/j.tetlet.2011.02.111
日期:2011.5
The 7-nitrobenz-2,1,3-oxadiazole (NBD) unit is a highly useful fluorescent tag with wide application in biology. Installation of the NBD group typically proceeds via the SNAr reaction between an amine and an NBD halide. Herein, we demonstrate that NBD-F 1 results in significantly higher yields than NBD-Cl 2, and that triethylamine in dimethylformamide at 23 °C overnight is a broadly applicable set
7-硝基苯-2,1,3-恶二唑(NBD)单元是一种非常有用的荧光标签,在生物学中具有广泛的应用。该NBD组的安装通常通过S前进Ñ胺和NBD卤化物之间的Ar反应。在本文中,我们证明NBD-F 1的收率明显高于NBD-Cl 2,并且在二甲基甲酰胺中于23°C过夜的三乙胺是该反应的广泛适用条件。特别地,现在可以用NBD-F以75%的产率制备高度有用的荧光碳水化合物2-NBD-葡糖胺(2-NBDG,3),而用NBD-C为12%。