Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 13031-04-4, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 13031-04-4
The synthesis of the 3-methylenetetrahydrofuran-2-ones 3a-q from the alpha-keto-gamma-lactones 1a,b and the Wittig compounds 2a-h is described.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem