Facet-Dependent Catalytic Activity of Cu<sub>2</sub>O Nanocrystals in the One-Pot Synthesis of 1,2,3-Triazoles by Multicomponent Click Reactions
作者:Kaushik Chanda、Sourav Rej、Michael H. Huang
DOI:10.1002/chem.201302065
日期:2013.11.18
highly facet‐dependent catalytic activity of Cu2O nanocubes, octahedra, and rhombicdodecahedra for the multicomponent direct synthesis of 1,2,3‐triazoles from the reaction of alkynes, organic halides, and NaN3. The catalytic activities of clean surfactant‐removed Cu2O nanocrystals with the same total surface area were compared. Rhombic dodecahedral Cu2O nanocrystalsbounded by 110} facets were much
Ruthenium-Catalyzed Cyclization of Epoxide with a Tethered Alkyne: Formation of Ketene Intermediates via Oxygen Transfer from Epoxides to Terminal Alkynes
作者:Reniguntala J. Madhushaw、Ming-Yuan Lin、Shariar Md. Abu Sohel、Rai-Shung Liu
DOI:10.1021/ja049943c
日期:2004.6.1
Treatment of (o-ethynyl)phenyl epoxides with TpRuPPh(3)(CH(3)CN)(2)PF(6) (10 mol %) in hot toluene (100 degrees C, 3-6 h) gave 2-naphthols or 1-alkylidene-2-indanones very selectively with isolated yields exceeding 72%, depending on the nature of the epoxide substituents. Surprisingly, the reaction intermediate proved to be a ruthenium-pi-ketene species that can be trapped efficiently by alcohol to
Indium(III)-Catalyzed Cyclization of Aromatic 5-Enynamides: Facile Synthesis of 2-Aminonaphthalenes, 2-Amino-1<i>H</i>-indenes, and 2,3-Dihydro-1<i>H</i>-indeno[2,1-<i>b</i>]pyridines
作者:Ming-Chang P. Yeh、Chia-Jung Liang、Hsiao-Feng Chen、Yu-Ting Weng
DOI:10.1002/adsc.201500449
日期:2015.10.12
efficient synthesis of 2-aminonaphthalenes and 2-amino-1H-indenes from aromatic N-methyl-N-tosyl-ynamides bearing an ortho-vinyl and -isobutenyl group, respectively. The aromatic N-3-arylpropargylynamides bearing an ortho-gem-dihalovinyl subunit underwent a tandem cyclization/carbobromination reaction in the presence of indium tribromide to provide the dibrominated 2,3-dihydro-1H-indeno[2,1-b]pyridine
研究了铟(III)催化的芳香族5-乙酰胺的环化反应。三氟甲磺酸铟能够分别由带有邻-乙烯基和-异丁烯基的芳族N-甲基-N-甲苯磺酰基-酰胺酰胺有效地合成2-氨基萘和2-氨基-1 H-茚。在三溴化铟存在下,带有邻位-二卤代戊二酰基亚基的芳族N -3-芳基炔丙炔基酰胺进行串联环化/碳溴化反应,以提供二溴代的2,3-二氢-1 H-茚并[2,1 - b ]吡啶衍生品收益率高。
Madhushaw, Reniguntala J.; Lo, Ching-Yu; Hwang, Chun-Wei, Journal of the American Chemical Society, 2004, vol. 126, # 47, p. 15560 - 15565
Silver-Catalyzed Stereoselective [3+2] Cycloadditions of Cyclopropyl-Indanimines with Carbonyl Compounds
作者:Hsiao-Hua Hung、Yi-Ching Liao、Rai-Shung Liu
DOI:10.1002/adsc.201300090
日期:2013.5.17
Silver‐catalyzed stereoselective [3+2] cycloadditions between mono‐substituted cyclopropyl‐indanimines and aldehydes are reported. The stereochemical course of the reaction is rationalized with a cyclic transition state. The resulting indanimine cycloadducts are not readily hydrolyzed unless external aldehydes are present with the silver catalyst. Notably, this hydrolysis process leads to a change