The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 98-03-3, Name is Thiophene-2-aldehyde, SMILES is C1=C(SC=C1)C=O, in an article , author is Mantelingu, Kempegowda, once mentioned of 98-03-3, Formula: 112.15.
Intramolecular [3+2]-Cycloadditions of Azomethine Ylides Derived from Secondary Amines via Redox-Neutral C-H Functionalization
Azomethine ylides are accessed under mild conditions via benzoic acid catalyzed condensations of 1,2,3,4-tetrahydroisoquinolines or tryptolines with aldehydes bearing a pendent dipolarophile. These intermediates undergo intramolecular [3 + 2]-cycloadditions in a highly diastereoselective fashion to form polycyclic amines with four new stereogenic centers. Challenging substrates such as piperidine, morpholine, and thiomorpholine undergo the corresponding reactions at elevated temperatures.
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Reference:
Thiomorpholine – Wikipedia,
,Thiomorpholine | C4H9NS – PubChem