The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. Formula: https://www.ambeed.com/products/505-48-6.html, 505-48-6, Name is Octanedioic acid, SMILES is C(C(O)=O)CCCCCC(O)=O, in an article , author is Jadhav, Prakash D., once mentioned of 505-48-6.
Gold-Catalyzed [5+2]- and [5+1]-Annulations between Ynamides and 1,2-Benzisoxazoles with Ligand-Controlled Chemoselectivity
This work describes two distinct annulations between ynamides and 1,2-benzisoxazoles with chemo-selectivity controlled by ligands. With IPrAuCl/AgNTf2, aryl-substituted ynamides undergo [5+2]-annulation reactions, whereas P(t-Bu)(2)(o-biphenyl)AuCl/AgNTf2 alters the chemoselectivity of the same ynamides to implement [5+1]-annulation reactions. C-13-Labeling experiments confirm that a 1,2-sulfonamide shift is involved in the [5+1]-annulation process. A plausible mechanism is postulated to rationalize the mechanisms of the two annulations.
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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics