(Chemical Equation Presented) Treatment of β-keto esters with terminal acetylenes in the presence of a catalytic amount of a manganese complex, MnBr(CO) 5, and molecular sieves, gave multisubstituted aromatic compounds in good to excellent yields. This reaction employs [2 + 2 + 2] cycloaddition of β-keto esters and 2 equiv of terminal acetylenes with dehydration. In the case of a 1,3-diketone, the corresponding acetophenone derivative and its deacylated compound can be synthesized selectively.
|出版ステータス||Published - 2008|
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