Multicomponent Synthesis of Tetrahydroisoquinolines
作者:Linwei Zeng、Bo Huang、Yangyong Shen、Sunliang Cui
DOI:10.1021/acs.orglett.8b01159
日期:2018.6.15
A multicomponentsynthesis of tetrahydroisoquinolines from carboxylic acids, alkynyl ethers, and dihydroisoquinolines is described. This process features readily available starting materials, simple experimental procedures for achievement of molecule complexity, and structural diversity. The preliminary control experiment and crossover reaction provide important insight into the reaction mechanism
Enantioselective Heck Arylation of Acyclic Alkenol Aryl Ethers: Synthetic Applications and DFT Investigation of the Stereoselectivity
作者:Ellen Christine Polo、Martí Fernández Wang、Ricardo Almir Angnes、Ataualpa A. C. Braga、Carlos Roque Duarte Correia
DOI:10.1002/adsc.201901471
日期:2020.2.21
Heck‐Matsuda adducts were further converted into more complex and valuable scaffolds including their syntheticapplication in the synthesis of (R)‐Fluoxetine, (R)‐Atomoxetine, and in the synthesis of an enantioenriched benzo[c]chromene. Finally, in silico mechanistic investigations into the reaction'senantioselectivity were performed using density functional theory.
在本文中,我们报告了无环E和Z链烯基芳基醚的对映选择性Heck-Matsuda芳基化。反应在温和的条件下进行,以区域选择性的方式得到对映体富集的苄基醚,中等至良好的收率(高达73%),以及良好至优异的对映体比率(高达97:3)。对映体选择性的Heck-松田芳基化已经显示出宽范围(25个实施例),并且一些关键的Heck-松田加合物进一步转化成更复杂的和有价值的支架包括在(合成及其合成应用- [R)-Fluoxetine,(- [R )-托莫西汀,以及在对映体富集的苯并[ c ]色烯的合成中。最后,在计算机上 使用密度泛函理论对反应的对映选择性进行了机理研究。
Scope and Limitations of the Intermolecular Furan-Yne Cyclization
作者:Anna Zeiler、Michael J. Ziegler、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/adsc.201500081
日期:2015.5.4
Different types of alkynes were reacted with 2,5‐disubstituted furans in order to evaluate the scope of the intermolecular furan‐yne reaction. With ethynyl aryl ethers as starting materials, 2‐phenoxy phenols were accessible in moderate to good yields. A different reaction mode was observed for alkynes bearing electron‐withdrawing substituents. For these starting materials a cis‐selective hydroarylation
Metal-Free Oxidative Cyclization of Alkynyl Aryl Ethers to Benzofuranones
作者:Katharina Graf、Carmen L. Rühl、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201304813
日期:2013.11.25
Readily available phenols can be converted into substituted arylalkynylethers, which react with an N‐oxide as an oxidant and catalytic amounts of a Brønsted acid to provide benzofuranones. If non‐terminal alkynylethers are applied, a 1,2‐hydride shift takes place and phenyl acrylates are obtained. Thus activated alkynes can serve as α‐oxy carbene precursors even in the absence of a metal catalyst
Gold(I)‐Catalyzed Intermolecular Formal [4+2] Cycloaddition of
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‐Aryl Ynol Ethers and Enol Ethers: Synthesis of Chromene Derivatives
作者:Tatiana Suárez‐Rodríguez、Ángel L. Suárez‐Sobrino、Alfredo Ballesteros
DOI:10.1002/chem.202102534
日期:2021.9.9
of O-aryl ynol ethers 1 and enol ethers 2 is described. This intermolecular reaction between two electron-rich unsaturated systems takes place, under mild conditions, in the presence of 5 mol% [IPrAu(CH3CN)]SbF6 as catalyst giving chromene derivatives with good yields. The cycloaddition is completely regio- and stereoselective, as well as versatile for both reactives. Silyl enol ethers can also react