In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Safety of 3-Methylbenzofuran-2-carbaldehyde, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1199-07-1, name is 3-Methylbenzofuran-2-carbaldehyde. In an article，Which mentioned a new discovery about 1199-07-1
Ethyl 6-substituted-5-H/substituted-2,4-dioxo-Delta2-hexenoates(II) have been synthesized by condensation of 4-substituted-3-H/substituted-but-3-en-2-ones (I) with ethyl oxalate in dry ether.The esters (II) on reaction with hydrazine and arylhydrazines undergo cyclization to the corresponding ethyl 1-H/substituted-5-substituted-pyrazole-3-carboxylates (III) which are hydrolysed to the acids (IV) or converted into acid hydrazides (V).Condensation of II with acylhydrazines affords the hydrazones (VI) which are cyclized to the corresponding N-acylpyrazoles (VII).With hydroxylamine, compounds II give 3,5-disubstituted-isoxazoles (VIII) whereas with o-phenylenediamine they give hydroxyquinoxazlines (IX).Reaction of I with arylhydrazines affords the corresponding hydrazones (X) which on boiling with ethanol containing one drop of HCl undergo cyclization to the pyrazolines (XI).The latter compounds (XI) on treatment with an excess of bromine-water furnish the brominated pyrazole derivatives (XII).The alpha,beta-unsaturated ketones (I) also undergo condensation with acylhydrazines to afford the corresponding acylhydrazones (XIII).
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H1572O – PubChem