Manipulating Micellar Environments for Enhancing Transition Metal-Catalyzed Cross-Couplings in Water at Room Temperature
作者:Bruce H. Lipshutz、Subir Ghorai、Wendy Wen Yi Leong、Benjamin R. Taft、Daniel V. Krogstad
DOI:10.1021/jo200746y
日期:2011.6.17
The remarkable effects of added salts on the properties of aqueous micelles derived from the amphiphile PTS are described. Most notably, Heck reactions run in the presence of NaCl lead to couplings on aryl bromides in water at room temperature. Olefin cross- and ring-closing metathesis reactions run in the presence of small amounts of pH-lowering KHSO4 are also accelerated, another phenomenon that
描述了添加的盐对衍生自两亲物 PTS 的水性胶束的性质的显着影响。最值得注意的是,在 NaCl 存在下进行的 Heck 反应导致室温下水中芳基溴化物的偶联。在少量降低 pH 值的 KHSO 4存在下运行的烯烃交叉和闭环复分解反应也会加速,这是另一种不适用于有机介质中典型过程的现象。一般来说,这些盐效应允许在环境良性条件下进行具有合成价值的 C-C 键形成过程。还证明了表面活性剂的再循环。