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
transformation reaction using dimethylsulfoxonium methylide, a novel reaction was identified by which 5,6,7,8-tetrahydrocoumarin with the electron-withdrawing group at C3 was led to the spirobicyclo[3.1.0]hexane-cyclohexane derivative. Moreover, by establishing the scope of this reaction, it was confirmed that it is possible to apply this reaction to not only ring-fused α-pyrone derivatives but also a
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
Catalytic Asymmetric Inverse‐Electron‐Demand Diels–Alder Reactions of 2‐Pyrones with Indenes: Total Syntheses of Cephanolides A and B
作者:Yang Lu、Meng‐Meng Xu、Zhi‐Mao Zhang、Junliang Zhang、Quan Cai
DOI:10.1002/anie.202112223
日期:2021.12.13
Catalyticasymmetric all-carbon-based inverse-electron-demand Diels–Alderreactions of 2-pyrones with electronically unbiased indenes have been realized. This method enables the rapid and enantioselective construction of a wide range of hexahydrofluorenyl bridged-lactone scaffolds. Based on this method, asymmetric total syntheses of cephanolides A and B have been accomplished.