Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 68, Issue 7, Pages 2853-2860Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo026697j
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The reaction of trifluoroacetaldehyde ethyl hemiacetal or hydrate with an equimolar amount of enamines, derived from various methyl ketones, smoothly proceeded to give the corresponding beta-hydroxy-beta-trifluoromethyl ketones in high yields. An equimolar amount of imines derived from various methyl ketones with aliphatic, aromatic, and heteroaromatic substituents also readily reacted with trifluoroacetaldehyde ethyl hemiacetal or hydrate to afford the corresponding beta-hydroxy-beta-trifluoromethyl ketones in good to excellent yields. Difluoroacetaldehyde ethyl hemiacetal as well as pentafluoropropionaldehyde also participated in the reaction, affording good yields of the corresponding beta-hydroxy-beta-difluoromethyl or beta-pentafluoropropyl ketones.
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