Facile Construction of [6,6]-, [6,7]-, [6,8]-, and [6,9]Ring-Fused Triazole Frameworks by Copper-Catalyzed, Tandem, One-Pot, Click and Intramolecular Arylation Reactions: Elaboration to Fused Pentacyclic Derivatives
作者:M. Nagarjuna Reddy、K. C. Kumara Swamy
DOI:10.1002/ejoc.201101816
日期:2012.4
A sequential copper-catalyzed, one-pot, click reaction–intramolecular direct arylation, which involves two mechanistically distinct reactions (atom-economical clickreaction and direct arylation of 1,2,3-triazole), to generate [6,6]-, [6,7]-, [6,8]-, and [6,9]ring-fusedtriazoles is reported. Furthermore, a unique divergence of reactivity between the fusedtriazoles prepared from 2-bromobenzyl azide
Visible-Light-Induced Radical Carbo-Cyclization/<i>gem</i>-Diborylation through Triplet Energy Transfer between a Gold Catalyst and Aryl Iodides
作者:Lumin Zhang、Xiaojia Si、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/jacs.0c03197
日期:2020.6.10
because of their unique structures and reactivity. However, benzo-furan-, indole- and benzothiophene-based benzylic gem-diboronates, building blocks for biologically relevant compounds, are unknown. A promising protocol using visible light and aryl iodides for constructing valuable building blocks, including benzofuran-, indole- and benzothiophene-based benzylic gem-diboronates, via radical carbo-cy
This study presents a convenient approach to the synthesis of indole- and benzofuran-based benzylic sulfones using unactivated alkynes containing aryl iodides and sodium sulfinates under visible light irradiation. The procedure involves a sequential series of dehalogenation, carbo-cyclization, and radical sulfonylation. Plausible insights into the reaction mechanism are derived from control experiments