4100-80-5, Name is 3-Methyldihydrofuran-2,5-dione, belongs to tetrahydrofurans compound, is a common compound. Computed Properties of C5H6O3In an article, once mentioned the new application about 4100-80-5.
The Wittig Reaction with Glutaric and Succinic Anhydrides
Six-membered cyclic anhydrides, including glutaric and some of its alkylated derivatives, have been shown to yield enol-lactones with ethoxycarbonylmethylenetriphenylphosphorane; the (E) isomer is formed preferentially.The reactions of methyl-substituted succinic anhydrides with the same phosphorane give predominantly the (E) enol-lactone in all examples.The influence of alkyl substituents on the rates of the reactions and the product ratios in both the succinic and glutaric anhydride series is discussed.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem