Cu(II)-Catalyzed C–H Amidation/Cyclization of Azomethine Imines with Dioxazolones via Acyl Nitrenes: A Direct Access to Diverse 1,2,4-Triazole Derivatives
作者:Xiang Liu、Wen Li、Wenxuan Jiang、Hao Lu、Jiali Liu、Yijun Lin、Hua Cao
DOI:10.1021/acs.orglett.1c04044
日期:2022.1.21
We report a Cu(II)-catalyzed C–H amidation/cyclization of azomethine imines with dioxazolones as acyl nitrene transfer reagents under additive- and ligand-free conditions. An array of 1,2,4-triazolo[1,5-a]pyridine derivatives were afforded in moderate to good yields with excellent functional group tolerance. In addition, scale-up reaction and photoluminescence properties were discussed.
我们报告了在无添加剂和无配体条件下,Cu(II) 催化的 C-H 酰胺化/环化偶氮甲碱亚胺与二恶唑酮作为酰基氮烯转移试剂。一系列 1,2,4-三唑并[1,5- a ] 吡啶衍生物以中等至良好的产率提供,具有优异的官能团耐受性。此外,还讨论了放大反应和光致发光特性。
COMPOSITION AND METHODS FOR THE DESIGN AND DEVELOPMENT OF METALLO-ENZYME INHIBITORS
申请人:Pellecchia Maurizio
公开号:US20100041653A1
公开(公告)日:2010-02-18
The present disclosure provides compounds having the general structure A or pharmaceutically acceptable salts thereof:
R—X (A)
wherein R is an alkyl or aryl moiety comprising heterocyclic structures; and X is a metal-chelatin group selected from:
This disclosure further provides a focused library of compounds for use in the discovery and design of metallo-enzyme inhibitors. This fragment-based approach provides an assembly of a library of low molecular weight compounds (MW<300 Da) containing a variety of potential metal-chelating groups. The identification of the inhibitory scaffolds among these compounds provides the initial hit fragments that may be optimized for affinity against a particular target using common medicinal chemistry, structure-based or NMR-based approaches.
Experimental and computational studies on H<sub>2</sub>O-promoted, Rh-catalyzed transient-ligand-free <i>ortho</i>-C(sp<sup>2</sup>)–H amidation of benzaldehydes with dioxazolones
We develop an efficient and convenient ligand-free, rhodium-catalyzed ortho-C(sp2)–H amidation of benzaldehydes with dioxazolones using H2O as the key promoter.
Condition-dependent transformations between hydroximic acids and thioaceticacid were achieved. Using NH4HCO3 in the ethanol solvent, efficient N–O bond cleavage of hydroxamic acids occurred to afford primary amides with high functional group compatibility. The reaction was switched to O-acylation when NEt3 and H2O were used as the base and solvent, respectively. These facile transformations could