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The mechanism of formation of 1,5-diketone, a key intermediate in the stereoselective assembly of 2,3,4-trimethyl-7-methylidene-1,5-di(thiophen-2-yl)-6,8-dioxabicyclo[3.2.1]octane, and the conformational structures of the reagents and products were studied by quantum chemical calculations at the MP2/6-311++G**//B3LYP/6-31G* level of theory with solvent effects treated within the polarizable continuum...
Reactions of 3-hydroxyalkan-2-ones with (hetero)aromatic aldehydes under basic conditions lead to 4-aryl-1,7-dihydroxyalkane-2,6-diones. These products were also synthesized by dismutation of 4-aryl-1-hydroxyalk-3-ene-2-ones. The reactions proceed as tandem retro aldol reactions and the Michael addition.
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