Direct access to benzofuro[2,3-<i>b</i>]quinoline and 6<i>H</i>-chromeno[3,4-<i>b</i>]quinoline cores through gold-catalyzed annulation of anthranils with arenoxyethynes and aryl propargyl ethers
作者:Manoj D. Patil、Rai-Shung Liu
DOI:10.1039/c9ob00468h
日期:——
aryloxyethynes or arylpropargylethers to construct useful benzofuro[2,3-b]quinoline and 6H-chromeno[3,4-b]quinoline frameworks, respectively; these heterocycles are not readily available from literature methods despite their biological significance. This high atom- and step-economy strategy is highlighted by a broad substrate scope. The reaction mechanism is proposed to proceed through sequential cyclizations
这项工作报告了蒽与芳氧基乙炔或芳基炔丙基醚的轻松环合,分别构建有用的苯并呋喃[2,3- b ]喹啉和6 H- chromeno [3,4- b ]喹啉骨架。尽管这些杂环具有生物学意义,但仍不易从文献方法中获得。广泛的基材范围突出了这种高原子经济和阶梯经济的策略。提出通过α-亚氨基金卡宾中间体的氧芳基,金卡宾和苯甲醛之间的顺序环化来进行反应机理。
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
We have established that a cationic rhodium(I)-H8-BINAP complex catalyzes the complete intermolecular homo-[2+2+2] cycloaddition of aryl ethynyl ethers and cross-[2+2+2] cycloaddition of aryl ethynyl ethers with electron-deficient monoalkynes, leading to tri- and diaryloxybenzenes, respectively, at room temperature.
We have established the Rh-catalyzed high-yielding and highly 1,3,5-selective [2+2+2] cycloaddition of push-pull internal alkynes. This reaction allows for the shape- and size-tunable synthesis of covalent organic cages (aryl ether cages) using push-pull internal diynes. Some aryl ether cages encapsulated isolated water molecules in their hydrophobic cavity by hydrogen bonding with the multiple ester