A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 82294-70-0, Name is 4-Methylthiazole-5-carbaldehyde, molecular formula is C5H5NOS. In a Article，once mentioned of 82294-70-0, Quality Control of: 4-Methylthiazole-5-carbaldehyde
Generation of a thiazole o-quinodimethane from an imino derivative and its intermolecular Diels-Alder trapping with alkynes or quinones
(E)-5-(N-Benzylformimidoyl)-4-methylthiazole 3 was prepared in good yield from 5-formyl-4-methylthiazole and benzylamine. Treatment of 3 with methylchloroformate in the presence of ethyldiisopropylamine in refluxing toluene has generated o-quinodimethane (o-QDM) 4. In situ trapping of the latter with acetylenic or quinonoid dienophiles directly afforded the aromatized products 5, 6, 7 and 9. An unprecedented elimination of N- carbomethoxybenzylamine occurred from the primary dihydro or tetrahydro cycloadducts. Starting from ethyl-propynoate or juglone 8a, the single regioisomer 6 or 9a was obtained, while when using 2- or 3-bromojuglone 8b or 8c the reaction regiospecifically gave 9a or 9b. Calculations by the semi- empirical method PM3 indicated that the regiochemistry observed cannot be predicted by the frontier orbital coefficients theory for a concerted electrocyclic reaction, but is better explained by an attack of the nucleophilic end of diene 4 on the more electron deficient carbon of the dienophiles.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Quality Control of: 4-Methylthiazole-5-carbaldehyde. In my other articles, you can also check out more blogs about 82294-70-0
Reference：
Thiazole | C3H5797NS – PubChem,
Thiazole | chemical compound | Britannica