Cationic Rhodium(I)/Bisphosphane Complex-Catalyzed Isomerization of Secondary Propargylic Alcohols to α,β-Enones
作者:Ken Tanaka、Takeaki Shoji、Masao Hirano
DOI:10.1002/ejoc.200700071
日期:2007.6
alcohols to α,β-enones. A kinetic resolution of secondary propargylic alcohols proceeded with moderate selectivity with [Rh((R)-BINAP)]OTf as a catalyst. Mechanistic studies revealed that the isomerization proceeds through intramolecular 1,3- and 1,2-hydrogen migration pathways. The isomerization of propargylic diol derivatives was also investigated, which revealed that 1,4-diketones, furans, and α,β-enones
我们已经确定氢化阳离子 Rh(I)/双膦配合物是用于将仲炔醇异构化为 α,β-烯酮的高活性催化剂。仲炔醇的动力学拆分以 [Rh((R)-BINAP)]OTf 作为催化剂以中等选择性进行。机理研究表明,异构化通过分子内 1,3- 和 1,2- 氢迁移途径进行。还研究了炔二醇衍生物的异构化,结果表明 1,4-二酮、呋喃和 α,β-烯酮是从 2-butyn-1,4-diol、1-methoxy-2-butyn-4- ol 和 1-acetoxy-2-butyn-4-ol 衍生物,分别。此外,研究了炔二醇异构化的化学选择性,并观察到炔丙基羟基的优先氧化。