In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Safety of 3-Methyldihydrofuran-2(3H)-one, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1679-47-6, name is 3-Methyldihydrofuran-2(3H)-one. In an article，Which mentioned a new discovery about 1679-47-6
<3+4> and <3+5> Annulation Reactions of alpha-(Phenylthio) Dicarbonyl Electrophiles with Bis(trimethylsilyl) Enol Ethers: Synthesis of Highly Functionalized Medium Ring Cycles
The <3+4> and <3+5> annulations of bis(trimethylsilyl) enol ethers with 1,4- and 1,5-dicarbonyl electrophiles bearing alpha-phenylthio substituents leads to the formation of bicyclic <3.2.1> and <3.3.1> ethers with good regiochemical and stereochemical control.Subsequent oxidation of the phenylthio moiety followed by reduction with SmI2 constitutes a high-yielding and regioselective process for cleavage of the bridging ether linkage.The overal strategy provides a synthetic pathway for the synthesis of highly functionalized medium ring carbocycles.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem