Journal
ORGANIC LETTERS
Volume 10, Issue 14, Pages 3133-3135Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol801226t
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A reaction between a beta-keto ester and an acetylene in the presence of a rhenium complex, [ReBr(CO)(3)(thf)](2), as a catalyst, provided a 2-pyranone derivative in excellent yield via retro-aldol reaction (C-C single bond cleavage). By adding an acetylene-bearing ester group(s) after the formation of 2-pyranones, an aromatization reaction proceeded and multisubstituted aromatic compounds were obtained in good to excellent yields.
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