Asymmetric cross-aldol reactions of α-keto hydrazones and α,β-unsaturated γ-keto hydrazones with trifluoromethyl ketones
作者:Saúl Alberca、Esteban Matador、Javier Iglesias-Sigüenza、Ma de Gracia Retamosa、Rosario Fernández、José M. Lassaletta、David Monge
DOI:10.1039/d1cc05014a
日期:——
α-Keto hydrazones and α,β-unsaturated γ-keto hydrazones are suitable pro-nucleophiles for asymmetric cross-aldol reactions with trifluoromethyl ketones via aza-di(tri)enamine-type intermediates. A quinidine-derived primary amine catalyst affords tertiary trifluoromethylated alcohols in good-to-excellent yields and high enantioselectivities. Subsequent transformations of hydrazono moieties yield appealing