Source of Selectivity in Oxidative Cross-Coupling of Aryls by Solvent Effect of 1,1,1,3,3,3-Hexafluoropropan-2-ol
作者:Bernd Elsler、Anton Wiebe、Dieter Schollmeyer、Katrin M. Dyballa、Robert Franke、Siegfried R. Waldvogel
DOI:10.1002/chem.201501604
日期:2015.8.24
Solvents such as 1,1,1,3,3,3‐hexafluoroisopropanol (HFIP) with a high capacity for donating hydrogen bonds generate solvates that enter into selective cross‐coupling reactions of aryls upon oxidation. When electric current is employed for oxidation, reagent effects can be excluded and a decoupling of nucleophilicity from oxidation potential can be achieved. The addition of water or methanol to the
1,1,1,1,3,3,3-六氟异丙醇(HFIP)等具有高氢键供体能力的溶剂会生成溶剂化物,这些溶剂化物在氧化时会进入芳基的选择性交叉偶联反应。当使用电流进行氧化时,可以排除试剂的作用,并且可以实现亲核性与氧化电位的解偶联。向电解液中添加水或甲醇可以使氧化电位在特定范围内转移,从而为进行选择性的阳极交叉偶联反应创造了合适的系统。氧化还原电势的变化取决于所用底物的取代方式。该概念已从芳烃-苯酚扩展到苯酚-苯酚以及苯酚-苯胺交叉偶联。