[EN] PYRROLO [3, 2 -E] [1,2,4] TRIAZOLO [1,5 -A] PYRIMIDINES DERIVATIVES AS INHIBITORS OF MICROGLIA ACTIVATION [FR] DÉRIVÉS DE PYRROLO[3,2-E][1,2,4]TRIAZOLO[1,5-A]PYRIMIDINES EN TANT QU'INHIBITEURS DE L'ACTIVATION MICROGLIALE
A novel protocol for the efficient activation of the Beckmannrearrangement utilizing the readily available sulfuryl fluoride (SO2F2 gas) is reported. The substrate scope of this methodology has been demonstrated by 37 examples with good to nearly quantitative isolated yields in a short time. A tentative mechanism was proposed involving formation and elimination of sulfonyl ester.
报道了一种利用容易获得的硫酰氟(SO 2 F 2气体)有效激活贝克曼重排的新方案。该方法的底物范围已通过37个实例证明,并在短时间内获得了良好至近乎定量的分离产率。提出了一种尝试性的机制,涉及形成和消除磺酰基酯。
Continuous Platform To Generate Nitroalkanes On-Demand (in Situ) Using Peracetic Acid-Mediated Oxidation in a PFA Pipes-in-Series Reactor
作者:Sergey V. Tsukanov、Martin D. Johnson、Scott A. May、Stanley P. Kolis、Matthew H. Yates、Jeffrey N. Johnston
DOI:10.1021/acs.oprd.8b00113
日期:2018.8.17
of peroxides and nitroalkanes. The subsequent continuous extraction generates a solution of purified nitroalkane, which can be directly used in the following enantioselective aza-Henry chemistry to furnish valuable chiral diamine precursors with high selectivity, thus completely avoiding isolation of the potentially unsafe low-molecular-weight nitroalkane intermediate. A continuous campaign (16 h) established
Decarboxylative Amination: Diazirines as Single and Double Electrophilic Nitrogen Transfer Reagents
作者:Preeti P. Chandrachud、Lukasz Wojtas、Justin M. Lopchuk
DOI:10.1021/jacs.0c09403
日期:2020.12.30
structure and functionality of the substrate to be aminated. Further, many of these reagents are challenging to handle, engage in undesired side reactions, and function only within a narrow scope. Here we report the use of diazirines as practical reagents for the decarboxylative amination of simple and complex redox-active esters. The diaziridines thus produced are readily diversifiable to amines, hydrazines
Photodecarboxylative Amination of Redox-Active Esters with Diazirines
作者:Vishala Maharaj、Preeti P. Chandrachud、Wen Che、Lukasz Wojtas、Justin M. Lopchuk
DOI:10.1021/acs.orglett.1c03344
日期:2021.11.19
Diazirines have been recently demonstrated to serve as electrophilic amination reagents that afford diaziridines, versatile heterocycles that are readily transformed into amines, hydrazines, and nitrogen-containing heterocycles. Here, we report the photodecarboxylative amination of redox-active esters with diazirines using inexpensive photoactivators under mild conditions with an enhanced scope for
3,4-Di-substituted cyclobutene-1,2-diones as CXC-chemokine receptor ligands
申请人:Schering Corporation
公开号:US20040106794A1
公开(公告)日:2004-06-03
There are disclosed compounds of the formula
1
or a pharmaceutically acceptable salt or solvate thereof which are useful for the treatment of chemokine-mediated diseases such as acute and chronic inflammatory disorders and cancer.