Gold-catalyzed efficient tandem assembly of terminal alkynes and arynes: synthesis of alkynylated biphenyl derivatives
作者:Chunsong Xie、Yuhong Zhang、Yuzhu Yang
DOI:10.1039/b806821f
日期:——
Gold catalysts have been found to catalyze the tandem assembly of arynes and terminal alkynes efficiently in the presence of CuI under mild reaction conditions to provide useful alkynylated biphenyl derivatives.
AlCl3-Catalyzed Intramolecular Hydroarylation of Arenes with Alkynes
作者:Guangxin Gu、Hao Guo、Yang Li、Yu Wang、Dawen Xu、Ruiwen Jin
DOI:10.1055/s-0036-1588479
日期:2017.10
acid catalyzed intramolecular hydroarylation of arenes with alkynes. This cyclization proceeds efficiently in the presence of a catalytic amount of AlCl 3 , affording phenanthrenes in moderate to excellent yields. The catalyst is cheap and nontoxic. The functional-group tolerance is high. A plausible electrophilic aromatic substitution reactionmechanism is proposed for this transformation.
An efficient electrochemical synthesis of sulfonated phenanthrenes via the reaction of internal alkynes with sulfonyl hydrazides has been established. The protocol does not require a metal catalyst or external oxidants, providing a green and mild route to functionalized phenanthrenes. Moreover, the compatibility of various functional groups and decagram-scale experimental conditions demonstrate the
Synthesis of thiocyanato-containing phenanthrenes and dihydronaphthalenes <i>via</i> Lewis acid-activated tandem electrophilic thiocyanation/carbocyclization of alkynes
作者:Yong Gao、Ruirui Hua、Hongquan Yin、Fu-Xue Chen
DOI:10.1039/d3ob00001j
日期:——
A tandem electrophilic thiocyanation and cyclization of arene-alkynes has been developed under mild conditions, affording thiocyanato-substituted phenanthrenes, dihydronaphthalenes, 2H-chromenes and dihydroquinolines in moderate to excellent yields. This reaction provides an efficient protocol for the construction of C–SCN and C–C bonds in one step. In this transformation, N-thiocyanato reagent serves