Mechanochemical Synthesis of 1,2-Diketoindolizine Derivatives from Indolizines and Epoxides Using Piezoelectric Materials
作者:Yumei Wang、Ziwu Zhang、Lichan Deng、Tianfeng Lao、Zhengquan Su、Yue Yu、Hua Cao
DOI:10.1021/acs.orglett.1c02575
日期:2021.9.17
A simple and efficient mechanochemical-induced approach for the synthesis of 1,2-diketoindolizine derivatives has been developed. BaTiO3 was used as the piezoelectric material in this transformation. This method features no usage of solvent, simple experimental operation, scalable potential, and high conversion efficiency, which make it attractive and practical.
Synthesis of Pyrrolo[2,1,5-<i>cd</i>]indolizine Rings via Visible-Light-Induced Intermolecular [3+2] Cycloaddition of Indolizines and Alkynes
作者:Yu Zhang、Yue Yu、Bing-bing Liang、Yong-yan Pei、Xiang Liu、Hua-gang Yao、Hua Cao
DOI:10.1021/acs.joc.0c01253
日期:2020.8.21
smoothly underwent visible-light-induced intermolecular [3+2] annulations with internal alkynes to afford pyrrolo[2,1,5-cd]indolizine in good to excellent yields with high regioselectivity. Through this cascade reaction, a series of fluoroactive fused indolizines with a large π-system were conveniently synthesized. The usage of visiblelight as energy source with air as a stoichiometric oxidant under
一系列吲哚并嗪通过内部炔烃顺利地进行了可见光诱导的分子间[3 + 2]环空拆分,从而以良好的产率和良好的区域选择性提供了吡咯并[2,1,5- cd ]吲哚并嗪。通过该级联反应,方便地合成了具有大π系统的一系列含氟稠合吲哚嗪。在简单条件下使用可见光作为能源,以空气作为化学计量的氧化剂,使该过程具有吸引力和实用性。
Direct arylation of electron-poor indolizines
作者:Beata Koszarna、Rafał Matczak、Maciej Krzeszewski、Olena Vakuliuk、Jan Klajn、Mariusz Tasior、Jan T. Nowicki、Daniel T. Gryko
DOI:10.1016/j.tet.2013.11.088
日期:2014.1
Derivatized indolizines efficiently prepared via direct arylation, exhibit violet, blue or green fluorescence depending on the nature of substituents. By attaching two electron-withdrawing groups to five-membered ring it is possible to access a range of multi-substituted stable indolizine-based fluorophores. Compounds featuring this scaffold display advantageous combination of optical properties including
Photoinduced successive oxidative ring-opening and borylation of indolizines with NHC–boranes
作者:Huitao Zheng、Honggang Xiong、Chaobo Su、Hua Cao、Huagang Yao、Xiang Liu
DOI:10.1039/d1ra08072e
日期:——
A facile photoinduced successive oxidative ring-opening and borylation of indolizines with NHC–boranes via a one-pot method has been unveiled. This photo-promoted strategy enables the formation of unsaturated NHC–boryl carboxylates under transition metal-free and radical initiator-free conditions. A wide array of pyridine-containing NHC–boryl carboxylates were directly prepared in moderate to good