A novel Eu(III)-based luminescent chemosensor: determining pH in a highly acidic environment
摘要:
The design, synthesis and photophysical evaluation of the Eu(III)-based chemosensor [Eu .1], is described. The sensors show large (ca. 300 fold) pH dependent luminescence enhancements for the Eu(III) lanthanide emission, i.e. it is 'switched on' in highly acidic media, between pH ca. 1.5 and 3.5 with a pK(a) of 2.4 (+/-0.1) when excited at 350 nm. The fluorescence spectra of [Eu .1], consisting of the quinoline emission, is also pH dependent, where the fluorescence is 'switched on' at 458 nm, in the pH region of 3-6, but the emission is quenched between pH 1.5 and 3. Both pH-intensity profiles display an 'off-on-off' bell-shape behaviour similar to that seen for many enzymatic pH dependent processes. (C) 2001 Elsevier Science Ltd. All rights reserved.
Triamine derivatives and their acid-addition salts
申请人:SUMITOMO PHARMACEUTICALS COMPANY, LIMITED
公开号:EP0443862A1
公开(公告)日:1991-08-28
A triamine derivative of the formula (I)
wherein Ar¹ and Ar² are carbocyclic or heterocyclic single ring or fused ring aromatic groups, R¹, R² and R³ are hydrogen, lower alkyl, aryl aryl-alkyl, aryl-alkyloxycarbonyl, alkyloxycarbonyl or acyl, and A¹ and A² are lower alkylene groups optionally substituted by oxo, exhibits a high N-methyl-D-aspartic acid (NMDA) receptor antagonistic effect and are therefore useful as a medicine for nerve degeneration diseases.
Butyrylcholinesterase (BChE) has been considered as a potential therapeutic target for Alzheimer’s disease (AD) because of its compensation capacity to hydrolyze acetylcholine (ACh) and its close association with Aβ deposit. Here, we identified S06-1011 (hBChE IC50 = 16 nM) and S06-1031 (hBChE IC50 = 25 nM) as highly effective and selective BChE inhibitors, which were proved to be safe and long-acting
丁酰胆碱酯酶(BChE)因其水解乙酰胆碱(ACh)的补偿能力及其与Aβ沉积的密切关系而被认为是阿尔茨海默病(AD)的潜在治疗靶点。在这里,我们确定了S06-1011 ( h BChE IC 50 = 16 nM) 和S06-1031 ( h BChE IC 50 = 25 nM) 为高效、选择性 BChE 抑制剂,并被证明是安全且长效的。候选化合物在东莨菪碱和 Aβ 1-42肽诱导的认知缺陷模型中表现出神经保护作用和改善认知的能力。最佳候选者S06-1011提高了BChE底物ghrelin的水平,可以起到改善精神情绪食欲的作用。 S06-1011处理组的体重增加显着增加。因此,抑制BChE不仅对痴呆具有保护作用,而且对治疗和护理也有很大作用。
Macrolides with antibacterial activity
申请人:——
公开号:US20030212011A1
公开(公告)日:2003-11-13
The invention provides new macrolides antibiotics of formula I with improved biological properties and having the formula
1
wherein R
1
, R
2
and R
3
are as herein described.
Exploration of N-alkyl-2-[(4-oxo-3-(4-sulfamoylphenyl)-3,4-dihydroquinazolin-2-yl)thio]acetamide derivatives as anticancer and radiosensitizing agents
作者:Aiten M. Soliman、Mostafa M. Ghorab
DOI:10.1016/j.bioorg.2019.102956
日期:2019.7
of 0.34-149.10 µM. The inhibition percentage of VEGFR-2 was measured for all the compounds and found to be in the range of 90.09-20.44%. The promising compounds 8, 12, 13, 16 and 17 were selected to measure their possible multikinase inhibitory activity against VEGFR-2 and EGFR. IC50 of the promising compounds were in the range of 247-793 nM for VEGFR-2 in reference to sunitinib (IC50 320 nM), and 369-725 nM
[EN] SYNTHESIS OF EGFR MODULATORS<br/>[FR] SYNTHÈSE DE MODULATEURS DE L'EGFR
申请人:UNIV MICHIGAN REGENTS
公开号:WO2022081514A1
公开(公告)日:2022-04-21
Provided herein are processes for synthesizing compounds useful as EGFR modulators. In particular, provided herein are processes for synthesizing Compound A: