polysubstituted furans were synthesized from furan derivatives involving copper-catalyzed ringopening of the furanring. This synthetic method possesses the advantages of readily available starting materials, mild reaction conditions, and short steps. A range of polysubstituted furans were synthesized from furan derivatives involving copper-catalyzed ringopening of the furanring. This synthetic
A class of polysubstituted functionalized furans was synthesized efficiently starting from readily available furans involving the oxidative ringopening of the furanrings using NBS as an oxidant. The reaction proceeded through a sequence of oxidative dearomatization of the furanring/spirocyclization/aromatization.
Gold Catalysis: Non-Spirocyclic Intermediates in the Conversion of Furanynes by the Formal Insertion of an Alkyne into an Aryl-Alkyl CC Single Bond
作者:A. Stephen K. Hashmi、Tobias Häffner、Weibo Yang、Sreekumar Pankajakshan、Sascha Schäfer、Lara Schultes、Frank Rominger、Wolfgang Frey
DOI:10.1002/chem.201200306
日期:2012.8.20
It takes al‐kynes: The formation of furyl‐substituted heterocycles from furanynes with donor groups on the furan–alkyne tether and mechanistic control experiments indicate the involvement of open‐chained carbenium ions in the overall insertion of an alkyne into a CCbond, rather than the usual spirocyclic intermediates (see scheme).
Catalytic Formal Benzylic C–H Bond Functionalization of 2,5-Dialkylfuran Derivatives with Ferrocenyl Alcohols as Alkylation Reagents
作者:Didi Ren、Lubin Xu、Liang Wang、Shuai-Shuai Li
DOI:10.1021/acs.orglett.8b03701
日期:2019.2.1
The inert benzylic C-H bond of pi-electron-rich heteroaromatic 2,5-dialkylfuran derivatives was conveniently functionalized with ferrocenyl alcohols as alkylation reagents under catalytic acidic conditions at room temperature, which features chemo- and regiospecificity, mild and metallic catalyst free conditions, and environmental benignity.
An easy access to unsymmetric trisubstituted methane derivatives (TRSMs)
作者:Sajal Kumar Das、Shagufta、Gautam Panda
DOI:10.1016/j.tetlet.2005.03.001
日期:2005.4
A new series of unsymmetric trisubstituted methane derivatives (TRSMs) has been synthesized through Friedel Crafts alkylation of aromatic nucleophiles using acid-sensitive heleroaryl carbinols. (c) 2005 Elsevier Ltd. All rights reserved.