The present invention provides a compound which has the effect of PDE inhibition, and which is useful as a medicament for preventing or treating schizophrenia or so on.
A compound of formula (I
0
):
wherein
R
1
represents
a substituent,
R
2
represents
a hydrogen atom, or a substituent,
R
3
represents
a hydrogen atom, or a substituent,
Ring A represents
an aromatic ring which can be substituted, and
Ring B represents
a 5-membered heteroaromatic ring which can be substituted,
or a salt thereof.
Spectral and cyclic voltammetric studies on some intramolecularly hydrogen bonded arylhydrazones: Crystal and molecular structure of 2-(2-(3-nitrophenyl)hydrazono)-5,5-dimethylcyclohexane-1,3-dione
作者:A. Sethukumar、B. Arul Prakasam
DOI:10.1016/j.molstruc.2009.11.001
日期:2010.1
the effective intramolecular hydrogen bonding in all the cases. Cyclic voltammetric studies certainly indicate that in all the cases the reduced center is C N bond of hydrazonic moiety. The single crystal X-ray structural analysis of 2-(2-(3-nitrophenyl)hydrazono)-5,5-dimethylcyclohexane-1,3-dione ( 6 ) is also reported. Single crystal X-ray analysis of 6 evidences the intramolecular hydrogen bonding
摘要 通过乙酰丙酮/二甲酮与各自的芳族重氮盐偶联制备了一系列芳腙衍生物( 1 - 7 ),并通过红外、 1 H 和 13 C NMR 光谱进行了表征。IR 和 NMR 光谱数据清楚地表明在所有情况下有效的分子内氢键。循环伏安研究肯定表明,在所有情况下,还原中心是腙部分的 CN 键。还报道了 2-(2-(3-硝基苯基) 腙)-5,5-二甲基环己烷-1,3-二酮 (6) 的单晶 X 射线结构分析。6 的单晶 X 射线分析证明分子内氢键与 N(2)⋯O(4) 距离为 2.642(15) A,根据 Etter 的图形命名法,可将其指定为 S(6)。分子(6)中的环己烷环构象可以描述为包膜。RAHB 研究表明,由于参与 Etter 图中共振循环 S(6) 的六个原子的非平面性,化合物 (6) 对氢键的共振辅助显着降低。共振循环 S(6) 的平面性受到环己烷环构象要求的极大干扰,因此 RAHB 概念在这种情况下不太适用。
Reaction of (Cyano)thioacetamide with Arylhydrazones of<i>β</i>-Diketones: Novel Synthesis of 2(1<i>H</i>)-Pyridinethiones, Thieno[2,3-<i>b</i>]pyridines, and Pyrazolo[3,4-<i>b</i>]pyridines
作者:Galal Eldin Hamza Elgemeie、Ali Mahmoud El-Zanate、Abdel-Kader E. Mansour
DOI:10.1246/bcsj.66.555
日期:1993.2
A novel synthesis of 2(1H)-pyridinethiones, thieno[2,3-b]pyridines and pyrazolo[3,4-b]pyridines utilizing (cyano)thioacetamide and arylhydrazones of 1,3-diketones as starting components is described.
A pyridazinone derivative represented by formula (I):
a pharmaceutically acceptable salt thereof, or a derivative thereof, or a pharmaceutical composition comprising as an active ingredient the derivative or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier or diluent.
Phenyl hydrazone bearing pyrazole and pyrimidine scaffolds: design and discovery of a novel class of non-nucleoside reverse transcriptase inhibitors (NNRTIs) against HIV-1 and their antibacterial properties
作者:Udaya Pratap Singh、Hans Raj Bhat、Amita Verma、Mukesh Kumar Kumawat、Rajinder Kaur、S. K. Gupta、Ramendra K. Singh
DOI:10.1039/c3ra41604f
日期:——
A novel series of phenyl hydrazone bearing pyrazole and pyrimidine hybrid compounds has been designed using the molinspiration toolkit based on Lipinski's rule of five and developed via sequential reactions starting from the diazotization of different anilines and further active methylation with acetyl acetone, ethyl acetoacetate and ethyl cyanoacetate to generate hydrazono derivatives. The target hybrid compounds were synthesized on cyclisation of the resulting hydrazono derivatives with hydrazine, phenyl hydrazine and urea. These molecules have been subsequently tested for anti-HIV activity using TZM-bl cell lines. The MTT assay was also carried out for the cytotoxicity determination of the active compounds. Further, to exemplify the key structural features of the molecules, a molecular docking analysis of the most active compounds was performed at the NNIBP of the HIV-RT protein. The antibacterial activity of the target compounds was also determined against a panel of four Gram-positive and four Gram-negative human pathogens. All molecules showed a potent anti-HIV activity along with a prominent inhibition of bacterial organisms.