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。
Visible-Light-Induced Regioselective Dicarbonylation of Indolizines with Oxoaldehydes via Direct C–H Functionalization
作者:Lili Teng、Xiang Liu、Pengfeng Guo、Yue Yu、Hua Cao
DOI:10.1021/acs.orglett.0c01094
日期:2020.5.15
A metal-free system for regioselective dehydrogenative cross-couplings between indolizines and oxoaldehydes catalyzed by visible light under mild conditions has been described. As an atom economical and eco-friendly protocol, the reaction proceeds in good yields using inexpensive, readily available visible-light sources and the environmentally friendly oxidant oxygen. Various valuable 1,2-dicarbonyl
A visible-light-induced intermolecular [3 + 2] alkenylation–cyclization strategy: metal-free construction of pyrrolo[2,1,5-<i>cd</i>]indolizine rings
作者:Yaofeng Liang、Lili Teng、Yajun Wang、Qiuxing He、Hua Cao
DOI:10.1039/c9gc01766f
日期:——
alkenylation–cyclization process has been developed. This reaction provided an unprecedented metal-free double C(sp2)–H bond oxidation coupling of indolizines with electron-deficient alkenes. Through this cascade reaction, a series of pyrrolo[2,1,5-cd]indolizinederivatives with a large π-system were synthesized. Furthermore, this approach features easily available starting materials, good functional group tolerance
已经开发了一种简单有效的可见光诱导的分子间[3 + 2]烯基化环化过程。此反应提供了史无前例的吲哚嗪与缺电子烯烃的无金属双C(sp 2)-H键氧化偶联。通过该级联反应,合成了一系列具有大π系统的吡咯并[2,1,5- cd ]吲哚并嗪衍生物。此外,这种方法的特点是容易获得的起始原料,良好的官能团耐受性,逐步经济性,高效和温和的条件。
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