Enantioselective Synthesis of Axially Chiral Biaryls by Diels–Alder/Retro-Diels–Alder Reaction of 2-Pyrones with Alkynes
作者:Meng-Meng Xu、Xin-Yu You、Yu-Zhen Zhang、Yang Lu、Kui Tan、Limin Yang、Quan Cai
DOI:10.1021/jacs.1c04759
日期:2021.6.23
The enantioselective synthesis of axiallychiralbiaryls by a copper-catalyzed Diels–Alder/retro-Diels–Alder reaction of 2-pyrones with alkynes is reported herein. Using electron-deficient 2-pyrones and electron-rich 1-naphthyl acetylenes as the reaction partners, a broad range of axiallychiralbiaryl esters are obtained in excellent yields (up to 97% yield) and enantioselectivities (up to >99% ee)
Enantioselective Synthesis of
<i>cis</i>
‐Decalin Derivatives by the Inverse‐Electron‐Demand Diels–Alder Reaction of 2‐Pyrones
作者:Xu‐Ge Si、Zhi‐Mao Zhang、Cheng‐Gong Zheng、Zhan‐Ting Li、Quan Cai
DOI:10.1002/anie.202006841
日期:2020.10.12
A novel strategy for the synthesis of cis‐decalins by an ytterbium‐catalyzed asymmetric inverse‐electron‐demand Diels–Alderreaction of 2‐pyrones and silyl cyclohexadienol ethers is reported here. A broad range of synthetically important cis‐decalin derivatives with multiple contiguous stereogenic centers and functionalities are obtained in good yields and stereoselectivities. A full set of diastereomeric
An enantioselective ambimodal cross-Diels–Alder reaction and applications in synthesis
作者:Meng-Meng Xu、Limin Yang、Kui Tan、Xiangyang Chen、Qi-Tao Lu、K. N. Houk、Quan Cai
DOI:10.1038/s41929-021-00687-x
日期:——
d adducts with high enantioselectivity under mild reaction conditions. Computational studies showed that this reaction proceeds through an ambimodal transition state: post-transition-state bifurcation leads to [2+4] and [4+2] adducts with the same enantioselectivity, followed by a facile Cope rearrangement to provide a single observed thermodynamic [2+4] product. This reaction occurs with a wide variety
An Exploration of the Potential
of [4+2] Cycloadditions of α-Pyrones
with Indenones for the Synthesis of the Norditerpenoid
Tropone, Harringtonolide
作者:Lewis Mander、Timothy O’Sullivan
DOI:10.1055/s-2003-40326
日期:——
The Diels-Alder reactions of 5-methoxyindenones with various α-pyrones provide the basis for a new and more efficient approach to the synthesis of the unusual nor-diterpenoid tropone, harringtonolide.
An Enantioselective Approach to
<scp>Heteroatom‐Containing</scp>
Bicyclic Derivatives via
<scp>Inverse‐Electron‐Demand</scp>
Diels−Alder Reactions
作者:Jun‐Xiong He、Xu‐Ge Si、Qi‐Tao Lu、Qian‐Wei Zhang、Quan Cai
DOI:10.1002/cjoc.202200441
日期:2023.1
important pharmacophores and prevalent in bioactive natural products and drug molecules. Herein, we report a unified approach for the divergent synthesis of chiral heteroatom-containing bicyclic derivatives by lanthanide (III)-catalyzed asymmetric inverse-electron-demand Diels–Alder reactions of 2-pyrones. These reactions occur with various readily available dihydropyrroles and dihydrofurans as dienophiles