Catalytic Formal Benzylic C–H Bond Functionalization of 2,5-Dialkylfuran Derivatives with Ferrocenyl Alcohols as Alkylation Reagents
摘要:
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.
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.
Conversion of 2-Furylcarbinols with Alkyl or Aryl Azides to Highly Functionalized 1,2,3-Triazoles via Cascade Formal [3 + 2] Cycloaddition/Ring-Opening
A Lewis acid promoted cascade cycloaddition/ring-opening of 2-furylcarbinols with alkyl or aryl azides is described. The reaction features an initial formal [3 + 2] cycloaddition to form a trisubstitued triazole motif, followed by a ring opening of furan to generate the (E)-configuration of the enone. A wide range of highly functionalized triazoles is expediently and efficiently synthesized in a highly step-economical manner.
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.
Interrupted Furan–Yne Cyclization: Access to Unsaturated Dicarbonyl Compounds and Their Subsequent Transformation into Functionalized Pyridazines
作者:Yury A. Vasev、Ekaterina R. Nasibullina、Anton S. Makarov、Maxim G. Uchuskin
DOI:10.1021/acs.orglett.3c02794
日期:2023.11.3
The key carbenoidintermediate of transition-metal-catalyzed furan–yne cyclization in Hashmi phenol synthesis could be efficiently intercepted with water under the developed reaction conditions in order to provide access to functionalized unsaturated dicarbonyl compounds that might serve as convenient precursors for the straightforward synthesis of annulated pyridazines.