Borrowing and Returning Oxygen Atom in Trifluoroacetic Anhydride Transfer to Nitrones: A Versatile Route for the Synthesis of <i>N</i>
-Trifluoroacetyl Amides
作者:Junwen Wang、Zhiqiang Weng
DOI:10.1002/ejoc.201801662
日期:2019.2.14
A variety of N‐trifluoroacetyl amides are obtained from trifluoroaceticanhydride transfers to nitrones through borrowing and returning oxygen atom. This transformation proceeds smoothly under mild conditions via electrophilic trifluoroacetylation, followed by nucleophilicaddition and elimination, and intramolecular substitution. Furthermore, the method also provides efficient access to N‐difluoroacetyl
Synthesis of 2-arylethenesulfonyl fluorides and isoindolinones: Ru-catalyzed C–H activation of nitrones with ethenesulfonyl fluoride
作者:Tong-Tong Wang、Li-Ming Zhao
DOI:10.1039/d2cc03418b
日期:——
2-arylethenesulfonyl fluorides from nitrones and ethenesulfonyl fluoride (ESF) by the activation of the C–H bond using an inexpensive and readily available Ru-catalyst has been developed. In this process, the directing group can be concomitantly converted to an amide group. Interestingly, changing the substituent of the nitrogen of nitrones from a tert-butyl to a methyl group resulted in the formation of cyclic isoindolinones
Synthesis of Angular Polycyclic Aromatic Molecules via Rh(III)‐Catalyzed C−H Annulation of Nitrones with Cyclic 2‐Diazo‐1,3‐diones
作者:Yan Wang、Li‐Ming Zhao
DOI:10.1002/adsc.202300720
日期:2023.11.7
We herein disclose a simple and general method for the synthesis of chromendiones through Rh(III)-catalyzed C−H functionalization/annulation reactions of nitrones with cyclic 2-diazo-1,3-diones by using nitrone group as a traceless directing group. This method exhibits high efficiency and broad functional group compatibility. The derivatization of these chromendiones has been also demonstrated to further
2-Substituted and 4-substituted aryl nitrone compounds
申请人:Kelly G. Michael
公开号:US20050182060A1
公开(公告)日:2005-08-18
The present invention provides aryl nitrones, compositions comprising the same and methods of their use for the treatment or prevention of oxidative, ischemic, ischemia/reperfusion-related and chemokine mediated conditions.