Propargylic Activation Across a Heterobimetallic Ir−Sn Catalyst: Nucleophilic Substitution and Indene Formation with Propargylic Alcohols
作者:Paresh Nath Chatterjee、Sujit Roy
DOI:10.1021/jo100189z
日期:2010.7.2
A nucleophilicsubstitution of propargylicalcohols with carbon (arene, heteroarene, and allyltrimethylsilane), sulfur (thiol), oxygen (alcohol), and nitrogen (sulfonamide) nucleophiles has been demonstrated using a high-valent [Ir(COD)(SnCl3)Cl(μ-Cl)]2 catalyst in 1,2-dichloroethane to afford the corresponding propargylic products in moderate to excellent yields. Alkyl or aryl substituted tertiary
Propargylation of aromatic compounds using Ce(OTf)3 as catalyst
作者:Claudio C. Silveira、Samuel R. Mendes、Guilherme M. Martins
DOI:10.1016/j.tetlet.2012.01.046
日期:2012.3
Ce(OTf)(3) was successfully employed as catalyst for the activation of the hydroxyl group in the Friedel-Crafts reaction of aromatic compounds with propargylic alcohols in nitromethane. The products were obtained in good to excellent yields. (C) 2012 Elsevier Ltd. All rights reserved.
Multimetallic Ir–Sn3-catalyzed substitution reaction of π-activated alcohols with carbon and heteroatom nucleophiles
作者:Arnab Kumar Maity、Paresh Nath Chatterjee、Sujit Roy
DOI:10.1016/j.tet.2012.10.086
日期:2013.1
An atom economic and catalytic substitutionreaction of π-activated alcohols by a multimetallic Ir–Sn3 complex has been demonstrated. The multimetallic Ir–Sn3 complex can be easily synthesized from the reaction between [Cp∗IrCl2]2 and SnCl2. In presence of as little as 1 mol % of the catalyst three different types of π-activated alcohols, namely benzyl, allyl, and propargyl alcohols, have been successfully
The photooxygenation of 2-propargylfurans enabled access to original nitrogen-containing cyclopentenones and related compounds in a one-pot fashion. By employing readily-available substrates such as furans and amines, we succeeded in achieving a high degree of molecular complexity. Relying on the introduction of an alkyne moiety and tailored substrates, this transformation reveals a new facet for reaction