Redox-Triggered CC Coupling of Diols and Alkynes: Synthesis of β,γ-Unsaturated α-Hydroxyketones and Furans by Ruthenium-Catalyzed Hydrohydroxyalkylation
作者:Emma L. McInturff、Khoa D. Nguyen、Michael J. Krische
DOI:10.1002/anie.201311130
日期:2014.3.17
ruthenium‐catalyzed CC coupling of alkynes and vicinal diols to form β,γ‐unsaturated ketones occurs with complete levels of regioselectivity and good to complete control over the alkene geometry. Exposure of the reaction products to substoichiometric quantities of p‐toluenesulfonic acid induces cyclodehydration to form tetrasubstituted furans. These alkyne‐diol hydrohydroxyalkylations contribute to a
直接钌催化的炔烃和邻位二醇的C - C偶联形成β,γ-不饱和酮,具有完全的区域选择性,并且能够很好地完全控制烯烃的几何结构。将反应产物暴露于亚化学计量的对甲苯磺酸会诱导环脱水形成四取代呋喃。这些炔二醇氢羟烷基化导致了越来越多的合并氧化还原反应事件,绕过了预金属化试剂的使用,从而避免了化学计量的金属副产物。