A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, COA of Formula: C5H9N3, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 51-45-6, Name is Histamine, molecular formula is C5H9N3. In an article, author is Sahani, Rajkumar Lalji,once mentioned of 51-45-6.
Gold-Catalyzed Oxidative Arylations of 3-Butyn-1-ols and 2-Propyn1-ols with Nitrones to Yield Distinct Fused Indoles Bearing a Heterocyclic Ring
The catalytic formation of various fused indoles from the nitrone oxidations of 1-substituted n-yn-1-ols (n = 2, 3) is described. For 3-butyn-1-ols, the oxidations yield tetrahydropyrano[4,3-b]indoles, whereas 2-propynols deliver tetrahydro-[1,2]oxazino[5,4-b]indoles efficiently. When styryl nitrones were tested on 2-propyn-1-ols, dihydrooxazolo[3,4-a]indoles were produced efficiently. We postulate that the formation of these fused indoles arises from a common mechanism, involving a [3,3]-sigmatropic shift of an initial alkenyl gold intermediate to furnish an oxoarylation before preceding to these fused indoles.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from?Bacillus thuringiensis?and?Bacillus velezensis?and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles