Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption. 130-03-0, name is Benzo[b]thiophen-3(2H)-one. In an article，Which mentioned a new discovery about 130-03-0, Quality Control of Benzo[b]thiophen-3(2H)-one.
Synthesis of alpha-Oxo Sulphines from some Dihydrothiophenes and Thionyl Chloride. Ascertainment of their Structure using the Cycloadducts with 2,3-Dimethylbutadiene
A reinvestigation of the reaction of the dihydrothiophenes (1a, b) with thionyl chloride confirmed that the sulphines (2) are the products obtained, the structure of (2a) being ascertained by X-ray diffraction analysis of its Diels-Alder adduct (3a): the same reaction on dihydrothiophene (6) produced the corresponding sulphine (7).
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Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem