In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Safety of 5-Methylisobenzofuran-1(3H)-one, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 54120-64-8, name is 5-Methylisobenzofuran-1(3H)-one. In an article，Which mentioned a new discovery about 54120-64-8
A metal-catalyst-free intramolecular Heck carbonylation reaction of benzyl alcohols and benzyl amines with carbon monoxide under heating at 250 C affords the corresponding benzolactones and benzolactams in good to excellent yields. A hybrid radical/ionic chain mechanism, involving electron transfer from radical anions generated by nucleophilic attack of alcohols or amines on intermediate acyl radicals, is proposed.
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H1234O – PubChem