Rhodium(III)-Catalyzed Annulation of Pyridinones with Alkynes via Double C–H Activation: A Route to Functionalized Quinolizinones
作者:Juan Li、Yudong Yang、Zhigang Wang、Boya Feng、Jingsong You
DOI:10.1021/acs.orglett.7b01159
日期:2017.6.16
A Rh(III)-catalyzed oxidative annulation of pyridin-2(1H)-ones with alkynesviadouble C–H activation to produce highly functionalized 4H-quinolizin-4-ones is disclosed. This reaction features easily available starting materials, simple manipulation, a relatively wide substrate scope, and good functional group tolerance. The application of this protocol is demonstrated by the synthesis of a known fluorescent
An efficient copper-catalyzed coupling reaction of pyridin-2-ones with aryl and heterocyclic halides based on Buchwald's protocol
作者:Chun Sing Li、Darryl D. Dixon
DOI:10.1016/j.tetlet.2004.04.019
日期:2004.5
An efficientcopper-catalyzedcoupling reaction based on the Buchwald's protocol has been established for pyridin-2-ones with aryl iodides, aryl bromides, and heterocyclic bromides.
<i>N</i>-Arylation of Pyridin-2(1<i>H</i>)-ones with Pentavalent Organobismuth Reagents under Copper-Free Conditions
作者:Kazuhiro Ikegai、Yuzo Nagata、Teruaki Mukaiyama
DOI:10.1246/bcsj.79.761
日期:2006.5
and the related heteroaromatic lactams has been established via ligand-coupling reactions using tri- or tetra-aryl organobismuth(V) reagents such as triarylbismuth dichlorides. Also, N-alkenylation of pyridin-2(1H)-one was achieved similarly by using alkenyltriarylbismuth(V) reagents.
A method to functionalize the arene ring of pirfenidone has been demonstrated using pyridone as a directing group. Unlike the functionalization of the pyridone nucleus, the method demonstrated here is the alkenylation of the N-aryl ring of pirfenidone with internal alkynes using ruthenium catalyst. High functional group tolerance, simple reaction conditions and site-selective functionalization permit
Novel substituted 8-phenylquinolines represented by Formula (I), wherein the phenyl group at the 8-position contains an aryl or heteroaryl substituent in the meta position, are PDE4 inhibitors.