Yb(OTf)3-Promoted ZnCl2-Catalyzed Conia-Ene Reaction of Linear β-Alkynic β-Dicarbonyls
作者:Jin-Heng Li、Yu Liu、Ren-Jie Song
DOI:10.1055/s-0030-1258213
日期:2010.11
An atom-economical and solvent-free ytterbium(III) triflate promoted, zinc(II) chloride catalyzed Conia-ene method has been developed for the construction of five- to six-membered-ring carbocycles. In the presence of zinc(II) chloride and ytterbium(III) triflate, a variety of linear β-alkynic β-keto esters and β-alkynic β-diketones were cyclized under neat conditions in moderate to good yields. It
已经开发了一种原子经济且无溶剂的三氟甲磺酸(III)促进的氯化锌(II)催化的Conia-ene方法,用于构建五元至六元环的碳环。在氯化锌(II)和三氟甲磺酸(III)的存在下,在纯净条件下,以中等至良好的收率将各种线性的β-链烯基β-酮酸酯和β-链烯基β-二酮环化。值得注意的是,对五或六元环碳环的选择性取决于末端炔烃上的取代基。 氯化锌(II)-三氟甲磺酸(III)-Conia-ene反应-线性β-炔烃β-二羰基-碳环