Dinuclear zinc catalyzed asymmetric tandem Michael addition/acetalization reactions of cyclic diketones and β,γ-unsaturated α-ketoesters
作者:Xixi Song、Jing Liu、Meng-Meng Liu、Xi Wang、Zhao-Fei Zhang、Min-Can Wang、Junbiao Chang
DOI:10.1016/j.tet.2014.06.109
日期:2014.9
The dinuclear zinc–ProPhenol complex is applied as efficient catalyst in the highly stereoselective tandem Michael addition/acetalization reactions of cyclic 1,3-diketones and β,γ-unsaturated α-ketoesters. A variety of substrates are well-tolerated, and a broad range of synthetically and pharmaceutically useful chiral chromene derivatives are directly produced in good yields of up to 96% and good
双核锌-ProPhenol配合物在环状1,3-二酮和β,γ-不饱和α-酮酸酯的高度立体选择性串联迈克尔加成/缩醛反应中用作有效的催化剂。多种底物具有良好的耐受性,并且直接以高达96%的高收率和高达96%ee的良好对映选择性直接生产了广泛的合成和药学上有用的手性色烯衍生物。