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。
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
Gold(I) Catalysis Applied to the Stereoselective Synthesis of Indeno[2,1-<i>b</i>]thiochromene Derivatives and Seleno Analogues
作者:Cintia Virumbrales、Mahmoud A. E. A. A. A. El-Remaily、Samuel Suárez-Pantiga、Manuel A. Fernández-Rodríguez、Félix Rodríguez、Roberto Sanz
DOI:10.1021/acs.orglett.2c03411
日期:2022.11.4
synthesis of sulfur- or selenium-containing indeno[1,2-b]chromene derivatives from o-(alkynyl)styrenes substituted at the triple bond with a thio- or seleno-aryl group is described. The reaction involves a double cyclization process through a proposed key gold–cyclopropyl carbene intermediate that evolves by the intramolecularaddition of an aromatic to the cyclopropane ring, affording polycyclic structures
金 (I) 催化的级联反应,用于立体选择性合成含硫或含硒的茚并 [1,2- b ] 色烯衍生物,从邻(炔基)苯乙烯在三键处被硫代或硒代芳基取代组进行了说明。该反应涉及通过提出的关键金-环丙基卡宾中间体的双环化过程,该中间体通过将芳族化合物分子内加成到环丙烷环上而形成,提供多环结构。使用带有手性配体的金 (I) 配合物研究了对映选择性版本。
Madhushaw, Reniguntala J.; Lo, Ching-Yu; Hwang, Chun-Wei, Journal of the American Chemical Society, 2004, vol. 126, # 47, p. 15560 - 15565