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Organocatalyzed Asymmetric Aldol Reactions of Ketones and β,γ‑Unsaturated α‑Ketoesters and Phenylglyoxal Hydrates
journal contributionposted on 2015-01-16, 00:00 authored by Swapna Konda, Qun-Sheng Guo, Manabu Abe, Huicai Huang, Hadi Arman, John C.-G. Zhao
Enantioselective aldol reactions of acetophenone with β,γ-unsaturated α-ketoesters and cyclic ketones with phenylglyoxal hydrates were realized with cinchona alkaloid-derived thiourea catalysts. The corresponding aldol products were obtained in high yields and good to excellent diastereoselectivities and enantioselectivities (up to 95% ee).