N-aryl pyrazoles: DFT calculations of CH acidity and deprotonative metallation using a combination of lithium and zinc amides
作者:Floris Chevallier、Yury S. Halauko、Christelle Pecceu、Ibrahim F. Nassar、To Uyen Dam、Thierry Roisnel、Vadim E. Matulis、Oleg A. Ivashkevich、Florence Mongin
DOI:10.1039/c1ob05267e
日期:——
A series of N-aryl and N-heteroaryl pyrazoles have been deproto-metallated using a 2,2,6,6-tetramethylpiperidino-based mixed lithium–zinc combination. Mono-, di-, and tri-iodides have been obtained after subsequent trapping with iodine, depending on the substrate and on the quantity of base used. The results have been discussed in the light of the CH acidities of the substrates, determined both in the gas phase and in THF solution using the DFT B3LYP method.
Mild Conditions for Copper-CatalysedN-Arylation of Pyrazoles
作者:Henri-Jean Cristau、Pascal P. Cellier、Jean-Francis Spindler、Marc Taillefer
DOI:10.1002/ejoc.200300709
日期:2004.2
Copper-catalysed N-arylation of pyrazoles with aryl or heteroaryl bromides or iodides, which can include functional substituents, was performed under the mildest conditions yet described, with excellent yields and selectivity, by the use as catalyst of a combination of cuprous oxide with a set of inexpensive, chelating oxime-type ligands not previously known to promote such reactions. Other original
[EN] PYRAZOLO [4, 3-D] PYRIMIDINES USEFUL AS KINASE INHIBITORS<br/>[FR] PYRAZOLO[4,3-D]PYRIMIDINES UTILES EN TANT QU'INHIBITEURS DE KINASES
申请人:ORIGENIS GMBH
公开号:WO2012143144A1
公开(公告)日:2012-10-26
The present invention relates to novel compounds of formula (I) that are capable of inhibiting one or more kinases, especially SYK (Spleen Tyrosine Kinase), LRRK2 (Leucine-rich repeat kinase 2) and/or MYLK (Myosin light chain kinase) or mutants thereof. The compounds find applications in the treatment of a variety of diseases. These diseases include autoimmune diseases, inflammatory diseases, bone diseases, metabolic diseases, neurological and neurodegenerative diseases, cancer, cardiovascular diseases, allergies, asthma, alzheimer's disease, parkinson's disease, skin disorders, eye diseases, infectious diseases and hormone-related diseases.
A simple and efficient method for Cp*CoIII-catalyzed C–H bond alkylation using activated olefins was developed. Selective C–H monoalkylation was performed at ambient temperature. One-pot symmetrical dialkylation and sequential unsymmetrical C–H dialkylation were performed to give the desired products in excellent yields. The reaction was found to proceed through an M–alkyl intermediate after migratory
开发了一种使用活化烯烃进行Cp * Co III催化的C–H键烷基化的简单有效的方法。选择性C–H单烷基化反应是在环境温度下进行的。一锅对称二烷基化和连续不对称CH二烷基化反应以优异的收率得到了所需的产物。发现该反应在迁移插入后通过M-烷基中间体进行,并且该中间体进行原金属脱金属反应,以产生预期的烷基化产物以及再生的催化剂。
Ruthenium- and Rhodium-Catalyzed Direct Carbonylation of the Ortho C−H Bond in the Benzene Ring of <i>N</i>-Arylpyrazoles
The direct carbonylation of C−H bonds in the benzene ring of N-phenylpyrazoles via catalysis by ruthenium or rhodium complexes is described. The reaction of N-phenylpyrazoles with carbon monoxide and ethylene in the presence of Ru3(CO)12 or Rh4(CO)12 resulted in the site-selectivecarbonylation of the ortho C−H bonds in the benzene ring to give the corresponding ethyl ketones. A variety of functional
描述了通过钌或铑络合物催化的N-苯基吡唑苯环中CH键的直接羰基化。在Ru 3(CO)12或Rh 4(CO)12存在下,N-苯基吡唑与一氧化碳和乙烯的反应导致苯环中邻位C-H键的位点选择性羰基化,得到相应的乙基酮。苯环上的各种官能团都是可以容忍的。基于p K a,N-苯基吡唑具有比预期更高的反应性吡唑共轭酸的分子量值。用于该反应的溶剂的选择是重要的,并且N,N-二甲基乙酰胺(DMA)给出了最好的结果。