Transition-metal-catalyzed, directed intermolecular C–Hbond functionalization is synthetically useful but heavily underexplored in multiheteroatom heterocycle synthesis. Herein we report a cobalt catalytic method for the formation of a three-nitrogen-bearing benzotriazine scaffold via the coupling of arylhydrazine and oxadiazolone. This synthetic protocol features a low-cost base metal catalyst, a
[EN] INHIBITORS OF INDOLEAMINE 2,3-DIOXYGENASE AND METHODS OF THEIR USE<br/>[FR] INHIBITEURS DE L'INDOLÉAMINE 2,3-DIOXYGÉNASE ET LEURS PROCÉDÉS D'UTILISATION
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2020023356A1
公开(公告)日:2020-01-30
The present invention provides compounds of formula (I) wherein all of the variables are as defined herein. These compounds are inhibitors of indoleamine 2,3-dioxygenase (IDO), which may be used as medicaments for the treatment of proliferative disorders, such as cancer, viral infections and/or autoimmune diseases.
Tf<sub>2</sub>NH-catalyzed formal [3 + 2] cycloaddition of oxadiazolones with ynamides: a simple access to aminoimidazoles
作者:Yingying Zhao、Yancheng Hu、Xincheng Li、Boshun Wan
DOI:10.1039/c7ob00701a
日期:——
Oxadiazolones are first employed as the three-atom coupling partners in the Tf2NH-catalyzed cycloaddition with ynamides. This formal [3 + 2] cycloaddition allows a rapid synthesis of aminoimidazoles with a broad substrate scope. The approach also features a metal-free catalytic cycloaddition process, which may find applications in the synthesis of bioactive molecules. Besides, the resulting N-methyl
address the challenge. In particular, a cobalt homeostatic catalysis process has been developed for the water-tolerant coupling of enaminones and oxadiazolones to quinazolinones. Dynamic covalent bonding serves as a mechanistic handle for the preferred buffering of water onto enaminone and reverse exchange by a released secondary amine, thus securing reversible entry into cobalt’s dormant and active states