Rhenium-Catalyzed Regiodivergent Addition of Indoles to Terminal Alkynes
摘要:
An efficient rhenium-catalyzed site-switchable addition of indoles to terminal alkynes is described. A variety of bisindolylalkane derivatives are expeditiously synthesized in high yields with excellent regioselectivity. Preliminary mechanistic study sheds light on the observed regiodivergent addition.
La反应 de cyclopropanation entre le dibromomethylene, obtenu a partir du reactif Seyferth (PhHgCBr 3 ), et les alcenes electroniquement deficients est non立体特异性
General and selective <i>syn</i>-carboxylation-trifluoromethylation of terminal alkynes: application to the late-stage modification of dehydrocholic acid
alkynes by a Cu(III)–CF3 complex and a carboxylic acid regioselectively and with unusual syn-stereochemistry. This method is broadly applicable to various carboxylic acids and terminal alkynes, producing a range of biologically active trifluoromethyl enol carboxylic esters. The synthetic potential of this method is further demonstrated by the late-stage functionalization of a complex pharmaceutical compound
Hydrogen-Bonding-Assisted α-F Elimination from Cu–CF<sub>3</sub> for in Situ Generation of R<sub>3</sub>N·HF Reagents: Reaction Design and Applications
作者:Song-Lin Zhang、Jia-Jia Dong
DOI:10.1021/acs.orglett.9b02516
日期:2019.9.6
isted α-F elimination from Cu-CF3 compounds that generates R3N·HF reagents in situ. Combining this strategy and Cu(III)-CF3 chemistry with alkynes, dual fluorination and trifluoromethylation of terminal alkynes is enabled by a single Cu(III)-CF3 compound assisted by a tertiary amine with excellent regio- and stereoselectivity. This strategy also enables the development of other reaction types involving
Relay Palladium/Copper Catalysis Enabled Silylative [5 + 1] Benzannulation Using Terminal Alkynes as One-Carbon Units
作者:Li-Jun Wu、Fan Teng、Gui-Fen Lv、Jin-Heng Li
DOI:10.1021/acs.orglett.0c03144
日期:2020.11.6
Using terminal alkyne as a nontraditional one-carbon (C1) unit and silylborane as an external silicon pronucleophile, a relay palladium/copper-catalyzed silylative [5 + 1] benzannulation of 3-acetoxy-1,4-enynes for producing polysubstituted arylsilanes, especially including bioactive motif-based analogues, in a single reaction step through benzene ring skeleton assembly and silyl intermolecular incorporation