描述了一种对 α,β-不饱和酮的合成有价值的独特类型的铂催化。在 PtCl 2存在下,(2-芳基乙炔基)三甲基硅烷与 H 2 O 在 30 °C 下反应,以中等至良好的收率得到 1,4-二芳基丁-3-en-2-酮。 (2-烷基乙炔基)三甲基硅烷可以通过改性Pt催化剂体系有效转化为相应的水合二聚产物。机理研究表明酰基铂中间体参与催化循环。
Regioselective hydrations of 1-aryl-3-en-1-ynes using gold and platinum catalysts: selective production of 2-en-1-ones and 3-en-1-ones
作者:Bhanudas Dattatray Mokar、Rai-Shung Liu
DOI:10.1039/c4cc02786h
日期:——
Regiocontrolled hydrations of 1-aryl-3-en-1-ynes have been accomplished with IPrAuOTf and PtCl2/CO to yield 3-en-1-ones and 2-en-1-ones efficiently; our experimental data indicates that the sizes of catalysts play an important role.
A new regioselective approach to the synthesis of alpha-aryl enones is reported. This represents an important application of the Kuwajima-Urabe protocol toward the synthesis of this simple albeit complex functional array. Several a-aryl enones were synthesized by the palladium catalyzed arylation of triethylsilylenol ethers of enones with high regioselectivity and broad scope, utilizing sterically encumbered electron-rich phosphine ligands to drive the reaction.