Cu-Catalyzed Cyanation of Arylboronic Acids with Acetonitrile: A Dual Role of TEMPO
作者:Yamin Zhu、Linyi Li、Zengming Shen
DOI:10.1002/chem.201501823
日期:2015.9.14
acetonitrile as the “CN” source has been achieved under a Cu(cat.)/TEMPO system (TEMPO=2,2,6,6‐tetramethylpiperidine N‐oxide). The broad substrate scope includes a variety of electron‐rich and electron‐poor arylboronic acids, which react well to give the cyanated products in high to excellent yields. Mechanistic studies reveal that TEMPOCH2CN, generated in situ, is an active cyanating reagent, and shows high
[EN] RECEPTOR TYROSINE KINASE INHIBITORS FOR TREATMENT OF PROTEIN KINASE MODULATION-RESPONSIVE DISEASE OR DISORDER<br/>[FR] INHIBITEURS DU RÉCEPTEUR DE LA TYROSINE KINASE POUR LE TRAITEMENT DE MALADIE OU DE TROUBLE SENSIBLE À LA MODULATION DE LA PROTÉINE KINASE
申请人:US HEALTH
公开号:WO2021050900A1
公开(公告)日:2021-03-18
Ephrin type receptor tyrosine kinase inhibitors, also known as Eph tyrosine kinase receptor inhibitors, for treating cancer, an inflammatory disease, an autoimmune disease, or a degenerative disease characterized at least in part by the abnormal activity or expression of the Eph receptor tyrosine kinase. The inhibitors are particularly useful for treating colorectal cancer.
prepared and tested as simple catalysts of oxidations with hydrogen peroxide, using sulfoxidation as a model reaction. Their catalyticefficiency strongly depends on the type of substituent and is remarkable for derivatives with an electron-withdrawing group, showing reactivity comparable to that of flaviniumsalts which are the prominent organocatalysts for oxygenations. Because of their high stability
制备了一系列的单取代的嘧啶鎓和吡嗪鎓三氟甲磺酸酯和3,5-二取代的吡啶鎓三氟甲磺酸酯,并使用硫氧化作为模型反应,对过氧化氢的简单氧化催化剂进行了测试。它们的催化效率在很大程度上取决于取代基的类型,并且对于具有吸电子基团的衍生物而言是显着的,其反应性与黄酮盐相当,后者是氧合作用的主要有机催化剂。由于它们的高稳定性和良好的可及性,4-(三氟甲基)嘧啶鎓和3,5-二硝基吡啶鎓三氟甲磺酸盐是选择的催化剂,并显示出催化脂肪族和芳香族硫化物氧化为亚砜的作用,定量转化率高,制备产率高,并且具有优异的性能。化学选择性。K R +值(p K R + <5)和较小的负还原电位(E red > -0.5 V)。在催化氧化过程中原位形成的过氧化氢加合物充当底物氧化剂。通过在B3LYP / 6-311 ++ g(d,p)水平上的计算获得的从这些杂环氢过氧化物到硫代苯甲醚的转移的吉布斯自由能表明,它们是比烷基氢过氧化
Molecular Cage Impregnated Palladium Nanoparticles: Efficient, Additive-Free Heterogeneous Catalysts for Cyanation of Aryl Halides
salts in the absence of the cages form structure less agglomerates. The well-dispersed cage-embedded NPs exhibit efficient catalytic performance in the cyanation of arylhalides under heterogeneous, additive-free condition. Moreover, these materials have excellent stability and recyclability without any agglomeration of PdNPs after several cycles.
[EN] QUINAZOLINES AS POTASSIUM ION CHANNEL INHIBITORS<br/>[FR] QUINAZOLINES COMME INHIBITEURS DES CANAUX IONIQUES POTASSIQUES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2011028741A1
公开(公告)日:2011-03-10
A compound of formula (I) wherein A, X, Y, Z, R1 and R24 are described herein. The compounds are useful as inhibitors of potassium channel function and in the treatment and prevention of arrhythmia, IKur-associated disorders, and other disorders mediated by ion channel function.