Chiral Brønsted Acid from a Cationic Gold(I) Complex: Catalytic Enantioselective Protonation of Silyl Enol Ethers of Ketones
作者:Cheol Hong Cheon、Osamu Kanno、F. Dean Toste
DOI:10.1021/ja204331w
日期:2011.8.31
developed from a cationic gold(I) disphosphine complex in the presence of alcoholic solvent and applied to the enantioselective protonation reaction of silyl enol ethers of ketones. Various optically active cyclic ketones were obtained in excellent yields and high enantioselectivities, including cyclic ketones bearing aliphatic substrates at the α-position. Furthermore, the application of this Brønsted acid
在醇溶剂存在下,由阳离子金(I)二膦络合物开发出手性布朗斯台德酸,并将其应用于酮的硅烯醇醚的对映选择性质子化反应。以优异的产率和高对映选择性获得了各种光学活性环酮,包括在 α 位带有脂肪族底物的环酮。此外,该布朗斯台德酸的应用扩展到第一个布朗斯台德酸催化的无环底物的硅烯醇醚的对映选择性质子化反应,无论其E/Z比如何。