Rh(III)-catalyzed C-H activation of primary benzamides and tandem cyclization with cyclic 2-diazo-1,3-diketones for the synthesis of isocoumarins
作者:Xinwei He、Guang Han、Youpeng Zuo、Yongjia Shang
DOI:10.1016/j.tet.2018.10.045
日期:2018.12
A simple and efficient Rh(III)-catalyzed C-Hactivation and tandem intramolecular cyclization for the synthesis of isocoumarins has been developed. The protocol uses easily available primary benzamides and cyclic 2-diazo-1,3-diketones as starting materials. This reaction proceeds via C-C and C-O bond formation in a single reaction vessel, and the corresponding isocoumarins were obtained in moderate
Controllable construction of isoquinolinedione and isocoumarin scaffolds <i>via</i> Rh<sup>III</sup>-catalyzed C–H annulation of <i>N</i>-tosylbenzamides with diazo compounds
An efficient protocol for the synthesis of isoquinolinediones by RhIII-catalyzed C–H activation/annulation/decarboxylation of N-tosylbenzamides with diazo compounds is reported.
Iodonium Ylides as Carbene Precursors in Rh(III)-Catalyzed C–H Activation
作者:Yuqin Jiang、Pengfei Li、Jie Zhao、Bingxian Liu、Xingwei Li
DOI:10.1021/acs.orglett.0c02618
日期:2020.10.2
The rhodium(III)-catalyzed coupling of C–H substrates with iodonium ylides has been realized for the efficientsynthesis of diverse cyclic skeletons, where the iodonium ylides have been identified as efficient and outstanding carbene precursors. The reaction systems are applicable to both sp2 and sp3 C–H substrates under mild and redox-neutral conditions. The catalyst loading can be as low as 0.5 mol
Rh(
<scp>III</scp>
)‐Catalyzed Diverse C—H Functionalization of Iminopyridinium Ylides
作者:Zhenzhen Dong、Pengfei Li、Xingwei Li、Bingxian Liu
DOI:10.1002/cjoc.202100203
日期:2021.9
Divergent synthesis of useful skeletons has been realized via rhodium(III)-catalyzed C—H activation of iminopyridinium ylides and coupling with various unsaturated coupling reagents. Isocoumarins and isoquinolones were obtained via cleavage of the C—N or N—N bond in the ylidic directing group, while fluorinated alkenes were delivered with the directing group intact. The reactions occurred with wide
[EN] Substituted Bicyclic and Tricyclic Ureas and Amides, Analogues Thereof, and Methods Using Same<br/>[FR] URÉES ET AMIDES BICYCLIQUES ET TRICYCLIQUES SUBSTITUÉS, LEURS ANALOGUES ET PROCÉDÉS LES UTILISANT
申请人:ARBUTUS BIOPHARMA INC
公开号:WO2021127356A1
公开(公告)日:2021-06-24
The present disclosure includes substituted arylmethyl ureas, substituted heteroarylmethyl ureas, or analogues thereof, and compositions comprising the same, that can be used to treat or prevent hepatitis B virus (HBV) and/or hepatitis D virus (HDV) infections in a patient.