Design of donor–acceptor geometry for tuning excited-state polarization: fluorescence solvatochromism of push–pull biphenyls with various torsional restrictions on their aryl–aryl bonds
摘要:
In this work, push pull biphenyl analogs (4-(N,N-dimethylamino)-4'-formylbiphenyl) with a modulated dihedral angle of the aryl aryl bond, using a bridged structure or methyl groups, were synthesized. Photophysical measurements of the synthesized compounds revealed the effect of the torsion between N,N-dimethylaniline (donor) and benzaldehyde moieties (acceptor) on their solvatochromic properties. Our data showed that the sensitivity of the fluorescence maxima to solvent polarity gradually increases as the biphenyl chromophore was restricted to a twisted conformation. This finding indicates that changing the torsional restrictions on the donor acceptor system can be a factor to take into account for the development of novel solvatochromic dyes. (C) 2014 Elsevier Ltd. All rights reserved.
在富电子芳族化合物与儿茶酚硼烷的亲电CHH硼化反应中,亲电硼的催化生成是由各种Lewis和Brønsted酸对BH键的杂化作用引发的,它仅形成硼离子。配体解离后,相应的硼离子在苯胺衍生物以及含氮杂环上进行区域选择性亲电芳香取代。使用B(C 6 F 5)3来优化催化作用作为引发剂,并且在不添加外部碱或二氢受体的情况下进行。为了确保这些Friedel-Crafts型反应的有效转换,通常需要高于80°C的温度。机理实验表明,释放氢的硼/硼离子的再生是决定速率的。这一发现最终导致人们发现,添加烯烃后,催化CHH硼化可以首次在室温下进行。
Synthesis and Biological Activity of New 4-(Pyridin-4-yl)-(3-methoxy-5-methylphenyl)-1H-pyrazoles Derivatives as ROS Receptor Tyrosine Kinase Inhibitors
作者:Byung Sun Park、Ibrahim M. El-Deeb、Kyung Ho Yoo、Dong Keun Han、Jin Sung Tae、So Ha Lee
DOI:10.5012/bkcs.2012.33.11.3629
日期:2012.11.20
A series of new 4-(pyridin-4-yl)-(3-methoxy-5-methylphenyl)-1H-pyrazoles (6a-k & 7a-l) has been rationally designed based on the structure of the lead compound KIST301080, a selective ROS receptor tyrosine kinase inhibitor, in order to study the activity of ROS of this new class of inhibitors. The compounds were synthesized and screened against ROS kinase, where compound 6h showed moderate inhibitory
[EN] PYRROLOPYRIDAZINE COMPOUNDS AS KINASE INHIBITORS<br/>[FR] COMPOSÉS DE PYRROLOPYRIDAZINE UTILISÉS COMME INHIBITEURS DE KINASE
申请人:GOSSAMER BIOSERVICES INC
公开号:WO2022109492A1
公开(公告)日:2022-05-27
Described herein are inhibitors of JAK kinases, pharmaceutical compositions comprising them, processes for preparing them and uses of such inhibitors to treat or prevent diseases, disorders and conditions associated with kinase function.
Discovery of (<i>E</i>)-3-(3-((2-Cyano-4′-dimethylaminobiphenyl-4-ylmethyl)cyclohexanecarbonylamino)-5-fluorophenyl)acrylic Acid Methyl Ester, an Intestine-Specific, FXR Partial Agonist for the Treatment of Nonalcoholic Steatohepatitis