A Cascade Reaction of Michael Addition and Truce-Smiles Rearrangement to Synthesize Trisubstituted 4-Quinolone Derivatives
作者:Caixia Xie、Di Yang、Xinfeng Wang、Chen Ma
DOI:10.1021/acs.joc.0c01662
日期:2020.12.4
A novel transition-metal-free cascade reaction to synthesize 4-quinolone derivatives has been demonstrated. Michael addition and Truce-Smiles rearrangement are included in this protocol, providing a broad scope of 4-quinolones in moderate-to-excellent yields. This work serves as an example of the use of sulfonamides through Truce–Smiles rearrangement to build heterocyclic compounds under mild conditions
Synthesis of indoline-fused eight-membered azaheterocycles through Zn-catalyzed dearomatization of indoles and subsequent base-promoted C–C activation
作者:Yuanyang Mu、Yang Yuan、Ye Wang、Murong Xu、Ye Feng、Yulei Zhao、Yanzhong Li
DOI:10.1039/d0ob01626h
日期:——
A cascade reaction for the synthesis of indoline-fused eight-membered azaheterocycles has been developed through the Zn-catalyzed dearomatization of indoles, base-promoted ring-expansion and intramolecular SNAr reaction.
Base-Promoted Tandem Reaction Involving Insertion into Carbon-Carbon σ-Bonds: Synthesis of Xanthone and Chromone Derivatives
作者:Xingcan Cheng、Yuanyuan Zhou、Fangfang Zhang、Kai Zhu、Yuanyuan Liu、Yanzhong Li
DOI:10.1002/chem.201602064
日期:2016.8.26
Tandem reactions using base‐promoted processes have been developed for the synthesis of xanthone and chromone derivatives. The first examples of base‐promoted insertion reactions of isolated carbon–carbon triple bonds into carbon–carbon σ‐bonds have been reported. Using these approaches, polycyclic structures can be prepared. This reaction has the potential to become a general synthetic protocol for
Insertion of Isolated Alkynes into Carbon-Carbon σ-Bonds of Unstrained Cyclic β-Ketoesters via Transition-Metal-Free Tandem Reactions: Synthesis of Medium-Sized Ring Compounds
作者:Yuanyuan Zhou、Xianghua Tao、Qiyi Yao、Yulei Zhao、Yanzhong Li
DOI:10.1002/chem.201603798
日期:2016.12.12
transition‐metal‐free insertion of isolated alkynes into carbon–carbon σ‐bonds of unstrained cyclic β‐dicarbonyl compounds has been reported. These tandem reactions offer an efficient synthesis of medium‐sized ring or fused‐ring compounds through ring expansion. The methodology has the potential to be widely used throughout organic synthesis due to the easily accessible starting materials and mild reaction conditions