Ytterbium(III)-Catalyzed Addition Reaction of Alkynyltrifluoroborate Salts to α-Imino Esters: Efficient Synthesis of β-Unsaturated α-Amino Esters
作者:Hélio A. Stefani、Flávia Manarin、Amna N. Khan、Stanley N. S. Vasconcelos
DOI:10.1002/ejoc.201301421
日期:2014.2
We describe the development of a mild and efficient method for the preparation of β-unsaturatedα-aminoesters through the ytterbium triflate catalyzed addition of potassium alkynyltrifluoroboratesalts to imino esters. The synthetic viability of this protocol was supported by its high yields, short reaction times, and efficiency with regard to the scope of the substrates.