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。
Modular Construction of 2-Substituted Benzo[b]furans from 1,2-Dichlorovinyl Ethers
作者:Laina M. Geary、Philip G. Hultin
DOI:10.1021/ol902307m
日期:2009.12.3
(E)-1,2-Dichlorovinyl ethers and amides are easily accessible from trichloroethylene via nucleophilic addition across in situ synthesized dichloroacetylene. A one-pot, sequential Suzuki-Miyaura coupling/intramolecular direct arylation between dichlorovinyl ethers and organoboronic acids provides easy access to a variety of benzofurans in only two steps from inexpensive commercially available compounds. The method is extendable to the preparation of indoles from the analogous dichlorovinyl amides.
2-Substituted Benzo[b]furans from (E)-1,2-Dichlorovinyl Ethers and Organoboron Reagents: Scope and Mechanistic Investigations into the One-Pot Suzuki Coupling/Direct Arylation
作者:Laina M. Geary、Philip G. Hultin
DOI:10.1002/ejoc.201000787
日期:2010.10
phenols, boronic acids or other organoboron reagents, and trichloroethylene. The overall process requires only two synthetic steps, with the key step being a one-pot sequential Suzukicross-coupling/direct arylationreaction. The method tolerates many useful functional groups and does not require the installation of any other activating functionality. The modular nature of the process permits the rapid
A Fluorescence Polarization Assay for Binding to Macrophage Migration Inhibitory Factor and Crystal Structures for Complexes of Two Potent Inhibitors
作者:José A. Cisneros、Michael J. Robertson、Margarita Valhondo、William L Jorgensen
DOI:10.1021/jacs.6b04910
日期:2016.7.13
on monitoring the tautomerase activity using l-dopachrome methyl ester or 4-hydroxyphenyl pyruvic acid as substrates. The accuracy of these assays is compromised by several issues including substrate instability, spectral interference, and short linear periods for product formation. In this work, we report the syntheses of fluorescently labeled MIF inhibitors and their use in the first fluorescence polarization-based
Fluorinated 5- and 7-membered carbacycle motifs by reaction of difluorocarbene with acetylene ethers
作者:Poh Wai Chia、Davide Bello、Alexandra M. Z. Slawin、David O'Hagan
DOI:10.1039/c3cc39066g
日期:——
The reaction of acetylene ethers with difluorocarbene (CF(2)), generated from the Ruppert-Prakash reagent, unexpectedly gave rise to co-produced fluorinated bicyclic [2.1.1]-hex-2-ene and cyclohepta-1,4-diene ring products.