Chemoselective Claisen–Schmidt bis-substitutional condensation catalyzed by an alkoxy-bridged dinuclear Ti(IV) cluster
作者:Yufei Wu、Jie Hou、Yuliang Liu、Mingfu Zhang、Chen-Ho Tung、Yifeng Wang
DOI:10.1016/j.tet.2016.01.055
日期:2016.3
The highly efficient and chemoselective α,α′-bis-substitution of alkanones is important in organic synthesis. Herein, a dimeric titanium cluster, Ti2Cl2(OPri)6·2HOPri (Ti2), is used in the Claisen–Schmidt condensation reaction, for the selectively activation of symmetrical ketones containing α,α′-methylene groups and production of α,α′-bis-substituted alkanones in high efficiency and chemoselectivity
链烷酮的高效和化学选择性的α,α'-双取代在有机合成中很重要。在本文中,二聚物钛簇Ti 2 Cl 2(OPr i)6 ·2HOPr i(Ti 2)用于克莱森-施密特缩合反应,以选择性活化包含α,α'-亚甲基和高效和化学选择性生产α,α'-双取代链烷酮。高效和化学选择性可以扩展到各种典型的链烷酮和芳族醛。Ti 2的氧桥联二聚体基序 离子Ti-Cl键负责高效和化学选择性。