Medina-Mercado, Ignacio published the artcileGold-Catalyzed Ascorbic Acid-Induced Arylative Carbocyclization of Alkynes with Aryldiazonium Tetrafluoroborates, HPLC of Formula: 69626-75-1, the publication is ACS Catalysis (2021), 11(15), 8968-8977, database is CAplus.
Herein, arylative carbocyclization of alkynes 2-R-4-R1-C6H3XCH2CCR2 (X = O, S, NTs; R = H, I; R1 = H, OMe, Br, Ph, etc.; R2 = n-Bu, Ph, thiophen-2-yl, etc.) catalyzed by gold was described. In this process, Au(I) is oxidized to Au(III) with aryldiazonium tetrafluoroborates R3C6H4N2BF4 (R3 = 4-NO2, 3-CN, 4-C(O)OEt, etc.) following a photosensitizer-free and irradiation-free protocol. Ascorbic acid acts as a radical initiator, generating aryl radicals. According to DFT calculations, these radicals are added to Au(I), leading to a Au(II) species that is further oxidized to Au(III) with the assistance of a tetrafluoroborate anion. The overall arylative carbocyclization process is very energetically favorable, transforming arylpropargyl ethers into valuable 3,4-diaryl-2H-chromenes I in a completely regio- and stereoselective fashion. Furthermore, one of the synthesized 3,4-diaryl-2H-chromenes I exhibits polymorphism with marked differences in the color of its crystals, a property that could lead to the development of colored derivatives in the future.
ACS Catalysis published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, HPLC of Formula: 69626-75-1.
Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem