.alpha.-Halocarbonyl compounds. II. Position-specific preparation of .alpha.-bromoketones by bromination of lithium enolates. Position-specific introduction of .alpha.,.beta.-unsaturation into unsymmetrical ketones
SUR LA DOUBLE ÉNOLISATION DE LA DIMÉTHYL-3,3 CYCLOHEXANONE
作者:J. Champagne、H. Favre、D. Vocelle、Mlle I. Zbikowski
DOI:10.1139/v64-039
日期:1964.2.1
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Regiospecific Acylation, Alkylation, and Aldol Condensation using magnesium enolates resulting from the conjugate addition of<i>grignard</i>reagents to α, β-unsaturated ketones
作者:Ferdinand Näf、René Decorzant
DOI:10.1002/hlca.19740570508
日期:1974.7.17
The magnesium 3,3-dimethylcyclohex-1-enolate 1i, formed in the copper catalyzed addition of methylmagnesium iodide to 3-methylcyclohex-2-enone, has been subjected to regiospecific electrophilic reactions such as acylation, alkylation, and aldol condensation in order to find a new access to the damascones, ionones and carotenoids. By way of illustration a new synthesis of γ-damascone is described.