Li Wei-jie
2006
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Journal
Chemical Reagents
Abstract
The paper describes a concise method of synthesis of 3,4-disubstitutedfuran-2,5-dicarboxylic acids.A mixture of 1,2-carbonyl compounds(glyoxal trimer dihydrate,diethyl oxalate or benzil) with dimethyl diglycolate is refluxed via condensation for 6~8h in cyclohexane in the presence of KOH,and give furan-2,5-dicarboxylic acid,3,4-dihydroxyfuran-2,5-dicarboxylic acid and 3,4-diphenylfuran-2,5-dicarboxylic acid in the yields of 73.4%~98.6%.