I found the field of Chemistry very interesting. Saw the article Gold Catalysis of Non-Conjugated Haloacetylenes published in 2021.0. Computed Properties of C7H8O2, Reprint Addresses Haberhauer, G (corresponding author), Univ Duisburg Essen, Inst Organ Chem, Univ Str 7, D-45117 Essen, Germany.. The CAS is 150-76-5. Through research, I have a further understanding and discovery of Mequinol
Gold-catalyzed reactions of conjugated haloacetylenes are well known and usually result in the formation of addition or dimerization products. Herein, we report a gold-catalyzed reaction of non-conjugated- haloacetylenes, which leads exclusively to the halogenated cyclization products. Remarkable is the gold-catalyzed reaction of tritylhaloacetylenes to haloindene derivatives, as mechanistic studies reveal that an 1,2-aryl shift occurs in the initially formed gold complex. The potential functionalization at the halogen atom and the wide scope of these cyclization reactions make them an attractive method for the construction of cyclic systems.
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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