Oxidative Annulation of Anilides with Internal Alkynes Using an (Electron‐Deficient η
<sup>5</sup>
‐Cyclopentadienyl)Rhodium(III) Catalyst Under Ambient Conditions
作者:Yuki Hoshino、Yu Shibata、Ken Tanaka
DOI:10.1002/adsc.201300884
日期:2014.5.5
A dinuclear (electron‐deficient η5‐cyclopentadienyl)rhodium(III) complex was synthesized on a preparative scale via the rhodium‐catalyzed cross [2+2+1] cyclotrimerization of silylacetylenes and twoalkynylesters, leading to substitutedsilylfulvenes, followed by reductive complexation with rhodium(III) chloride in ethanol. The thus obtained dinuclear (electron‐deficient η5‐cyclopentadienyl)rhodium(III)
established that reductive complexation of functionalized benzofulvenes, which are readily prepared from commercially available indene and 2‐methylindene, with RhCl3 in ethanol affords the corresponding indenyl–rhodium(III) dichlorides bearing substituents at the 1‐ (H or CO2Et), 2‐ (H or Me), and 3‐ [CH2Ph or CH2(2‐MeOC6H4)] positions. The indenyl–rhodium(III) complexes bearing one ethoxycarbonyl
已经确定,可以很容易地从商业上可获得的茚和2-甲基茚与官能团苯并富勒烯与乙醇中的RhCl 3进行还原络合,得到相应的茚-铑(III)二氯化物,它们在1-(H或CO 2)处带有取代基。Et),2-(H或Me)和3- [CH 2 Ph或CH 2(2-MeOC 6 H 4)]位置。带有一个乙氧基羰基的茚-铑(III)配合物比我们先前报道的Cp E Rh III配合物对乙炔化物与内部炔烃的氧化[3 + 2]环合反应显示出更高的热稳定性和区域选择性。
Synthesis of indoles via palladium-catalyzed C–H activation of N-aryl amides followed by coupling with alkynes
作者:Feng Zhou、Xiuling Han、Xiyan Lu
DOI:10.1016/j.tetlet.2011.07.009
日期:2011.9
A convenient and efficient method for the construction of indole skeleton was developed via Pd-catalyzed C-H activation of N-aryl amides and subsequent coupling with alkynes. Both stoichiometric and catalytic versions have been successfully achieved. (C) 2011 Elsevier Ltd. All rights reserved.
Mechanochemical Ruthenium-Catalyzed Hydroarylations of Alkynes under Ball-Milling Conditions
作者:Hanchao Cheng、José G. Hernández、Carsten Bolm
DOI:10.1021/acs.orglett.7b02973
日期:2017.12.1
mechanochemical ruthenium-catalyzed hydroarylations of alkynes with acetanilides lead to trisubstituted alkenes. Only catalytic amounts of pivalic acid or copper acetate are required, and without the need for external heating, the reaction times are shorter than those of their solution-based counterpart. Mechanochemical oxidative annulations through palladium-catalyzed intramolecular amination convert the products