Copper-catalysed photoinduced decarboxylative alkynylation: a combined experimental and computational study
作者:Yu Mao、Wenxuan Zhao、Shuo Lu、Lei Yu、Yi Wang、Yong Liang、Shengyang Ni、Yi Pan
DOI:10.1039/d0sc02213f
日期:——
Redox-active esters (RAEs) as alkyl radical precursors have demonstrated great advantages for C–C bond formation. A decarboxylative cross-coupling method is described to afford substituted alkynes from various carboxylic acids using copper catalysts CuCl and Cu(acac)2. The photoexcitation of copper acetylides with electron-rich NEt3 as a ligand provides a general strategy to generate a range of alkyl
One-Pot Procedure for the Synthesis of<i>N</i>-Substituted 2-(Arylmethyl)pyrrolidines from 1-Aryl-2-cyclopropylalkynes and Primary Amines by a Hydroamination/Cyclopropylimine Rearrangement/Reduction Sequence
作者:Kerstin Gräbe、Björn Zwafelink、Sven Doye
DOI:10.1002/ejoc.200900515
日期:2009.11
A one-pot procedure for the synthesis of N-substituted 2-(arylmethyl)pyrrolidines from 1-aryl-2-cyclopropylalkynes and primary amines is presented. The procedure proceeded first through an [Ind2TiMe2]-catalyzed regioselective hydroamination of a 1-aryl-2-cyclopropylalkyne with a primary amine. The resulting cyclopropylimine, which was not isolated, was then forced to undergo a cyclopropylimine rearrangement