Lewis Acid-Mediated Reactions of 1-Cyclopropyl-2-arylethanone Derivatives with Allenic Ester, Ethyl Acetoacetate, and Methyl Acrylate
TMSOTf-mediated reactions of 2-aryl-1-(1-phenylcyclopropyl)ethanones <b>1</b> with allenic esters afford a novel method for the synthesis of 6-methyl-3a,7-diaryl-3,3a-dihydro-2<i>H</i>-benzofuran-4-one derivatives <b>2</b> in moderate yields. In addition, we also...
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2008
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