Chemoselective Synthesis of Trifluoromethylated γ-Butenolide Derivatives via Phosphine-Promoted Tandem Reaction of Allylic Carbonates and Trifluoromethyl Ketones
作者:Hua Xiao、Hong-yu Duan、Jun Ye、Ri-sheng Yao、Juan Ma、Zhe-zhe Yuan、Gang Zhao
DOI:10.1021/ol502709w
日期:2014.10.17
A novel chemoselective phosphine-mediated tandem reaction between nonsubstituted MBH carbonates and aryl trifluoromethyl ketones is described. The product selectivity of the reaction is easily tunable by changing the ratios of the two reactants, and mono- or bicyclic bistrifluoromethylated vinyl γ-butenolide products can be prepared with good chemoselectivity in modest-to-good yields and diastereoselectivities
描述了一种非取代的MBH碳酸酯与芳基三氟甲基酮之间新型的化学选择性膦介导的串联反应。通过改变两种反应物的比例可以很容易地调节反应的产物选择性,并且可以以良好的化学选择性和适中的收率和非对映选择性制备单环或双环的双三氟甲基化乙烯基γ-丁烯内酯产物。在膦催化下,通过一锅四步顺序形成双环γ-丁烯内酯结构是前所未有的。