Electrochemical investigations of some newly synthesized arylazapyrazole derivatives
摘要:
AbstractThree derivatives of arylazapyrazole ((E)-4-(phenyldiazenyl)-3,5-dimethyl-1H-pyrazole, (E)-4-[(4-fluorophenyl)diazenyl]-3,5-dimethyl-1H-pyrazole, and (E)-4-[(4-iodophenyl)diazenyl]-3,5-dimethyl-1H-pyrazole) were synthesized, characterized, and further investigated for their electrochemical behavior at glassy carbon electrode using cyclic voltammetry. All compounds were reduced following E i
N-aryl-piperazinealkanamides useful for improving sleep
申请人:Janssen Pharmaceutica N.V.
公开号:US04880808A1
公开(公告)日:1989-11-14
A method of improving sleep in warm-blooded animals suffering from sleep disorders, which method comprises the administration of particular N-aryl-piperazinealkanamide derivatives and compositions containing the same. Novel N-aryl-piperazinealkanamide derivatives.
[EN] PYRIDAZINONE DERIVATIVES<br/>[FR] DÉRIVÉS DE PYRIDAZINONE
申请人:HOFFMANN LA ROCHE
公开号:WO2010063610A1
公开(公告)日:2010-06-10
The present invention is concerned with novel pyridazinone derivatives of formula (I) wherein R1, R2, R3 and R4 are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds inhibit PDE10A and can be used as medicaments.
Evaluation of Substituent Effect in<i>Z</i>-Isomer Stability of Arylazo-1<i>H</i>-3,5-dimethylpyrazoles: Interplay of Steric, Electronic Effects and Hydrogen Bonding
substantial substituenteffects inferred through Taft and Hammett relationships, the concentration dependency in controlling the isomerization rates has also been observed. Kinetics studies at different concentrations, solvent effects, and computations have confirmed the decisive role of hydrogen bonding and solvent-assisted tautomerism in this regard. Through this study, a complex interplay of steric, electronic
研究了芳基取代基的电子和空间效应,以及氢键对苯基偶氮吡唑衍生物Z-异构体稳定性的影响。在这方面,38个取代的苯基偶氮吡唑衍生物和6个N-甲基苯基偶氮吡唑(具有间取代)已合成。使用紫外可见和NMR光谱技术对它们的光开关行为,光平稳态(PSS)和热反向异构化动力学进行了实验评估。此外,已经进行了密度泛函理论(DFT)计算以获得更详细的见解。尽管存在通过塔夫脱(Taft)和哈米特(Hammett)关系推断出的大量取代基效应,但也已观察到控制异构化速率时的浓度依赖性。在不同浓度,溶剂作用和计算条件下的动力学研究已经证实了氢键和溶剂辅助互变异构在这方面的决定性作用。通过这项研究,空间,电子效应和氢键之间的复杂相互作用是决定稳定性的因素。已经证明了芳基偶氮-1 H -3,5-二甲基吡唑中的Z-异构体。
PYRIDAZINONES
申请人:Alberati Daniela
公开号:US20100152193A1
公开(公告)日:2010-06-17
The present invention is concerned with novel pyridazinones of formula (I)
wherein R
1
, R
2
, R
3
and R
4
are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds inhibit PDE10A and can be used for the treatment of CNS disorders.
photoswitches (AAPIPs). These AAPIPs with different counter ions have been accessed through a modular synthetic approach in high yields. More importantly, the AAPIPs exhibit excellent reversible photoswitching and exceptional thermal stability in water. The effects of solvents, counter ions, substitutions, concentration, pH, and glutathione (GSH) have been evaluated using spectroscopic investigations