16691-79-5

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16691-79-5 Structure

Identification	Back Directory
[Name] 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE
[CAS] 16691-79-5
[Synonyms] bismethoxycarbonyldiphenylcyclopentadienone 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE DIMETHYL 3,4-DIPHENYLCYCLOPENTADIENONE-2,5-DICARBOXYLATE Dimethyl 2-oxo-4,5-diphenylcyclopenta-3,5-diene-1,3-dicarboxylate 3,4-DIPHENYLCYCLOPENTADIENONE-2,5-DICARBOXYLIC ACID DIMETHYL ESTER Dimethyl 3,4-Diphenylcyclopentadienone-2,5-dicarboxylate 3,4-Diphenylcyclopentadienone-2,5-dicarboxylic Acid Dimethyl Ester
[Molecular Formula] C21H16O5
[MDL Number] MFCD00111095
[MOL File] 16691-79-5.mol
[Molecular Weight] 348.35

Safety Data	Back Directory
[HS Code ] 2918.30.3000

Hazard Information	Back Directory
[Uses] 2,5-Bis(methoxycarbonyl)-3,4-diphenylcyclopentadienone is used a reagent for cycloaddition reactions.
[Preparation] Preparative Method of 2,5-Bis(methoxycarbonyl)-3,4-diphenylcyclopentadienone: equimolar amounts of benzil and dimethyl 2-propanone-1,3-dicarboxylate in MeOH or EtOH with OH- are allowed to react at 25 °C for 1 day to give the intermediate dimethyl 3,4-diphenyl-4- hydroxycyclopent-2-enone-2,5-dicarboxylate in 70-96% yield. Treatment of the intermediate with acid in benzene or in Ac₂O with heating gives the dienone in 98% yield containing 3% of the Diels-Alder dimer^[1-2].
[References] 1. Cookson, R. C.; Henstock, J. B.; Hudec, J.; Whitear, B. R. D. JCS(C) 1967, 1986. 2. White, D. M. JOC 1974, 39, 1951.

Spectrum Detail	Back Directory
[Spectrum Detail] 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE(16691-79-5)MS 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE(16691-79-5)¹HNMR 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE(16691-79-5)¹³CNMR 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE(16691-79-5)IR1 2,5-BIS(METHOXYCARBONYL)-3,4-DIPHENYLCYCLOPENTADIENONE(16691-79-5)IR2

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