卤化铟(III)催化邻炔基苯酚的加氢烷氧基化反应,以高收率提供苯并[ b ]呋喃。反应的进行与5-内切-挖区域选择性与各种在芳烃官能酚类和以高产率使用的InI炔基部分3在DCE(5摩尔%)。实验和计算研究支持了基于炔烃的铟(III)π-路易斯酸活化,然后进行苯酚的亲核加成和最终的原金属脱金属,得到相应的苯并[ b ]呋喃的机理。DFT计算表明二聚体In 2 I 6 是通过与炔烃和羟基的新型双配位而催化的物质。
卤化铟(III)催化邻炔基苯酚的加氢烷氧基化反应,以高收率提供苯并[ b ]呋喃。反应的进行与5-内切-挖区域选择性与各种在芳烃官能酚类和以高产率使用的InI炔基部分3在DCE(5摩尔%)。实验和计算研究支持了基于炔烃的铟(III)π-路易斯酸活化,然后进行苯酚的亲核加成和最终的原金属脱金属,得到相应的苯并[ b ]呋喃的机理。DFT计算表明二聚体In 2 I 6 是通过与炔烃和羟基的新型双配位而催化的物质。
Cycloisomerization of Aromatic Homo- and Bis-homopropargylic Alcohols via Catalytic Ru Vinylidenes: Formation of Benzofurans and Isochromenes
作者:Alejandro Varela-Fernández、Carlos González-Rodríguez、Jesús A. Varela、Luis Castedo、Carlos Saá
DOI:10.1021/ol902212h
日期:2009.11.19
Ru-catalyzed cycloisomerizations of aromatic homo- and bis-homopropargylic alcohols effectively afford benzofurans and isochromenes. These processes proved to be chemo- and regioselective (5-, and 6-endo cyclizations) derived from key Ru vinylidene intermediates. The presence of an amine/ammonium base−acid pair is crucial for the catalytic cycle.
α-Rhenabenzofuran with nonaromatic T<sub>0</sub> and aromatic S<sub>1</sub> states
作者:Junping Tang、Yilun Wang、Wei Bai、Yan Zhou、Wenyan Yu、Yang Li
DOI:10.1039/d2dt01001a
日期:——
The first α-rhenabenzofuran complexes 2–5 are obtained from one-pot reactions of ReCl3(PMePh2)3 with o-ethynyl phenols. With a delocalized structure, these paramagnetic compounds are nonaromatic at the ground state, which is a triplet. But they exhibit an aromaticsingletexcitedstate, revealed by DFT studies.
Haloboration of
<i>o</i>
‐Alkynyl Phenols Generates Halogenated Bicyclic‐Boronates**
作者:Kang Yuan、Michael J. Ingleson
DOI:10.1002/anie.202301463
日期:——
O-directed alkyne trans-haloboration using BX3 (X=Cl or Br) leads to C4-halogenated benzoxaborinines that are useful intermediates for accessing the core structure found in bicyclic boronate based β-lactamase inhibitors. A computational study identified two viable mechanisms to furnish the trans-haloboration products.
Indium(III)-Catalyzed Synthesis of Benzo[<i>b</i>]furans by Intramolecular Hydroalkoxylation of <i>ortho</i>-Alkynylphenols: Scope and Mechanistic Insights
作者:Lorena Alonso-Marañón、M. Montserrat Martínez、Luis A. Sarandeses、Enrique Gómez-Bengoa、José Pérez Sestelo
DOI:10.1021/acs.joc.8b00829
日期:2018.8.3
Indium(III) halides catalyze the hydroalkoxylation reaction of ortho-alkynylphenols to afford benzo[b]furans in good yields. The reaction proceeds with 5-endo-dig regioselectivity with a variety of phenols functionalized at the arene and alkyne moieties in high yields using InI3 (5 mol %) in DCE. Experimental and computational studies support a mechanism based on the indium(III) π-Lewis acid activation
卤化铟(III)催化邻炔基苯酚的加氢烷氧基化反应,以高收率提供苯并[ b ]呋喃。反应的进行与5-内切-挖区域选择性与各种在芳烃官能酚类和以高产率使用的InI炔基部分3在DCE(5摩尔%)。实验和计算研究支持了基于炔烃的铟(III)π-路易斯酸活化,然后进行苯酚的亲核加成和最终的原金属脱金属,得到相应的苯并[ b ]呋喃的机理。DFT计算表明二聚体In 2 I 6 是通过与炔烃和羟基的新型双配位而催化的物质。