The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. SDS of cas: 6192-52-5, 6192-52-5, Name is 4-Methylbenzenesulfonic acid hydrate, SMILES is O=S(C1=CC=C(C)C=C1)(O)=O.[H]O[H], in an article , author is Liao, Sheng-Rong, once mentioned of 6192-52-5.
Ring-contraction from benzo[b][1,4]thiazines to benzo[d]thiazolines induced by oxygen
An unexpected ring-contraction from benzo[b]pyrazino[1,2-d][1,4]thiazine-1,4-diones (6) to benzo[4,5] thiazolo[3,2-a]pyrazine-1,4-diones (7) has been developed. The preliminary mechanistic studies showed the transformation contained two independent steps: the first step is the formation of a Michael adduct upon the addition of the protic solvent, in the presence of base, to the C-2-C-3 double bond of compound 6, and the second step is a ring-contraction induced by oxygen via the migration of sulfur atom from C-2 to C-3 position. And its scope is also studied. (C) 2016 Elsevier Ltd. All rights reserved.
But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 6192-52-5, you can contact me at any time and look forward to more communication. SDS of cas: 6192-52-5.
Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem