The direct catalytic aldol reaction of trifluoromethyl -ketoneswith ketones has been accomplished. The reaction was achieved inthe presence of 10 mol% Et 2 Zn and N, N′-dimethylethylenediamineat ambient temperature to give the expected aldol-type productsin high yields (up to 99%).
完成了三氟甲基酮与酮的直接催化羟醛反应。该反应在环境温度下在 10 mol% Et 2 Zn 和 N,N'-二甲基乙二胺存在下完成,以高产率(高达 99%)得到预期的醇醛型产物。
Copper-Catalyzed Aldol Reaction of Vinyl Azides with Trifluoromethyl Ketones
A novel and efficient aldol reaction of readily available vinyl azides with trifluoromethyl ketones by copper catalysis is developed. The reaction is proposed to go through a nucleophilic trapping of vinyl azides with trifluoromethyl ketones as a trifluoromethyl source, leading to the assembly of diverse trifluoromethylated compounds under mild conditions in satisfactory yield.
Abstract Exceedingly fast preparation of trifluoromethyl tertiary alcohols has been accomplished from methyl ketones and trifluoromethyl ketones under solvent free conditions by cross Aldol reaction. The reaction was achieved in the presence of common inorganic base by grinding method at ambient temperature to give β -trifluoromethyl- β -hydroxyl ketones in high yields (up to 95%).
Enantioselective Synthesis of 5-Trifluoromethyl-2-isoxazolines and Their<i>N</i>-Oxides by [Hydroxy(tosyloxy)iodo]benzene-Mediated Oxidative N-O Coupling
Biologically attractive trifluoromethyl-2-isoxazoline N-oxides were synthesized in good yields for the first time by the [hydroxy(tosyloxy)iodo]benzene-mediated oxidative N–O coupling of β-trifluoromethyl β-hydroxy ketoximes generated from trifluoromethyl β-keto alcohols. The present method allows the synthesis of previously unknown 5-trifluoromethyl-2-isoxazoline N-oxides and also provides an alternative