Photoredox-Assisted Gold-Catalyzed Arylative Alkoxycyclization of 1,6-Enynes
作者:Joan G. Mayans、Jean-Simon Suppo、Antonio M. Echavarren
DOI:10.1021/acs.orglett.0c00799
日期:2020.4.17
gold-catalyzed arylative cyclization of 1,6-enynes with aryldiazonium salts gives rise to cyclization products with the opposite configuration at the alkene than that obtained by gold(I)-catalyzed alkoxycyclization. The reaction occurs under mild conditions and shows high functional group tolerance.
Readily available phosphoramidites incorporating TADDOL-related diols with an acyclic backbone turned out to be excellent ligands for asymmetric gold catalysis, allowing a number of mechanistically different transformations to be performed with good to outstanding enantioselectivities. This includes [2 + 2] and [4 + 2] cycloadditions of ene-allenes, cycloisomerizations of enynes, hydroarylation reactions