The Michael additions of dicarbonyl compounds, nitroalkanes, and thiols to 2-cyclohexen-1-one can be accomplished in water without phase transfer agents. The reaction is extremely sensitive to the pH of the reaction media, and therefore, the methodology can be optimized with the control of this variable. The best pH depends on the used nucleophile.Key words: Michael addition, aqueous media, water, 2-cyclohexen-1-one, ketone.
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