Steric-Hindrance-Induced Regio- and Chemoselective Oxidation of Aromatic Amines
摘要:
Unusual regio- and chemoselective oxidation of aromatic amines hindered with ortho substituents (except -NH2, -NHCH3, and -OH) to the corresponding nitro compounds is described by use of nonanebis(peroxoic acid). The mechanistic investigation for selective oxidation of amines ortho-substituted with -NH2 or -OH showed the involvement of H-bonding between the ortho hydrogen of the adjacent -XH group (where X = NH, NR, or O) and an oxygen atom from the diperoxy acid. Various mono- and diamines are oxidized into corresponding mononitro derivatives in high yield and purity without employing any protection strategies. The protocol was also found to successful on the gram scale.
Radical Trifluoromethoxylation of Arenes Triggered by a Visible‐Light‐Mediated N−O Bond Redox Fragmentation
作者:Benson J. Jelier、Pascal F. Tripet、Ewa Pietrasiak、Ivan Franzoni、Gunnar Jeschke、Antonio Togni
DOI:10.1002/anie.201806296
日期:2018.10.15
method enables non‐directed functionalization of C−H bonds on a range of substrates, providing access to aryl trifluoromethyl ethers. This light‐driven process is distinctly different from conventional procedures and occurs through an OCF3 radical mechanism mediated by a photoredox catalyst, which triggers an N−O bond fragmentation. The pyridinium‐based trifluoromethoxylation reagent is bench‐stable and
[EN] INHIBITORS OF BRUTON'S TYROSINE KINASE AND METHODS OF THEIR USE<br/>[FR] INHIBITEURS DE TYROSINE KINASE DE BRUTON ET LEURS PROCÉDÉS D'UTILISATION
申请人:JANSSEN PHARMACEUTICA NV
公开号:WO2017100668A1
公开(公告)日:2017-06-15
The present disclosure is directed to compounds of formula I and methods of their use and preparation, as well as compositions comprising compounds of formula I.
本公开涉及公式I的化合物及其使用和制备方法,以及包含公式I化合物的组合物。
<i>N</i>-Nitroheterocycles: Bench-Stable Organic Reagents for Catalytic <i>Ipso</i>-Nitration of Aryl- and Heteroarylboronic Acids
Photocatalytic and metal-free protocols to access various aromatic and heteroaromatic nitro compounds through ipso-nitration of readily available boronic acid derivatives were developed using non-metal-based, bench-stable, and recyclable nitrating reagents. These methods are operationally simple, mild, regioselective, and possess excellent functional group compatibility, delivering desired products
chromium-catalyzed activation of acyl C–O bonds with magnesium for amidation of esters with nitroarenes. Low-cost chromium(III) chloride shows high reactivity in promoting amidation by using magnesium as reductant and chlorotrimethylsilane as additive. It provides a step-economic strategy to the synthesis of centrally important amide motifs using inexpensive and air-stable nitroarenes as amino sources.
[EN] 2,4 DI (HETERO) -ARYLAMINO-PYRIMIDINE DERIVATIVES AS ZAP-70 AND/OR SYK INHIBITORS<br/>[FR] DERIVES DE 2,4-DI(HETERO)-ARYLAMINO-PYRIMIDINE COMME INHIBITEURS DES KINASES ZAP-70 ET/OU SYK
申请人:NOVARTIS AG
公开号:WO2005026158A1
公开(公告)日:2005-03-24
Disclosed are pyrimidine derivatives of formula (I); wherein R0, R1, R3 to R9, and Z have a signification as indicated in claim 1, which have ZAP-70 and/or Syk inhibitory activities.