The Synthesis of 4-Arylcarbonyl-3-methoxycarbonyl-2-phenylfurans by Friedel-Crafts Acylation Reactio

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Keto esters 8, 4-arylcarbonyl-3-methoxycarbonyl-2-phenylfurans, potential precursors of the synthesis of furofuran lignans, were obtained from dimethyl 2-phenylfuran-3,4-dicarboxylate 2.Diester 2 was selectively hydrolyzed to monoacid 6 followed by converting to its acid chloride 7.Friedel-Crafts acylation reactions of 7 with aromatic compounds afforded keto esters 8.The geometric structures of 8 and its precursors were elucidated and verified by NMR spectra.
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