Introducing a novel crystal form of pyruvic acid thiosemicarbazone and its sodium salt
摘要:
The reaction of thiosemicarbazide and sodium pyruvate has been thoroughly
studied and the novel crystal form of pyruvic acid thiosemicarbazone (H2pt)
and its sodium salt were obtained. Compounds were characterized by IR
spectra, melting points, elemental analysis and conductometric measurements,
as well as single-crystal X-ray analysis. A detailed comparative analysis of
crystal structures of these compounds is given, as well as comparison with
some of the earlier known complexes containing H2pt. The two novel crystal
structures exhibit notably different hydrogen bonding patterns, mutually and
in comparison with previously reported crystal form of H2pt. All crystal
structures are stabilized by extensive network of N-H...O, O-H...O and
N-H...S hydrogen bonds. The cyclic hydrogen bonding motif involving the
thioureido moieties of the ligand is the only one which repeats in each
structure.
硫代氨基脲与盐酸盐在双蒸水中以1:1的摩尔比混合,合成了硫代氨基脲盐酸盐(TSCHCL)。TSCHCL的单晶在室温下通过缓慢蒸发生长,并通过单晶X射线衍射研究确定分子结构,并通过FT-IR,1 H和13表征13 C NMR光谱分析证实合成的化合物。热重分析和差热分析揭示了晶体的热稳定性。TSCHCL的透射光谱表明,晶体在380-1100 nm的波长范围内是透明的。高分辨率X射线衍射法(HRXRD)用于评估生长晶体的完善性。使用维氏显微硬度测试研究了生长晶体的机械性能。使用Nd:YAG激光测试了粉状TSCHCL的二次谐波产生效率,约为正磷酸二氢钾的1.5倍。
structures. This study that was done using acetophenone thiosemicarbazone (1) as basic model, showed that: (a) the presence of lipophilic substituents in para position on benzene ring, (b) substitution of benzene ring and (c) substitution of hydrogen of thioamidefunction by a phenyl, strongly influence trypanocidal activity. The various modifications to basic structure (1) allowed the synthesis of 1-(4-chlorophenyl)
探索非洲锥虫缩氨基硫脲的结构-活性关系:布氏锥虫布氏,一系列的35缩氨基硫脲(1 - 35)已被合成和表征可以通过1 H NMR,13 C NMR,和FT-IR光谱。使用“ Lilit alamar blue”方法测试所有化合物的杀锥虫活性。考虑到它们的结构,比较了硫半脲的锥虫杀菌能力。该研究结果表明,使用苯乙酮缩氨基硫脲进行(1)作为基本模型,表明:(a)中的亲脂性的取代基的存在对在苯环上的位置,(b)苯环的取代和(c)硫代酰胺官能团的氢被苯基取代,强烈影响锥虫活性。对基本结构(1)的各种修饰允许合成1-(4-氯苯基)亚乙基-4-苯基-硫代氨基脲(34)。该化合物具有3.97μM的锥虫杀灭活性,是该系列中最活跃的。
Unsaturated lactones. LXXIII. Synthesis and antiviral activity of some substituted 2-buten-4-olides
作者:A. A. Avetisyan、A. N. Dzhandzhapanyan、R. G. Nazaryan、V. I. Votyakov、S. V. Khlyustov、G. V. Vladyko、V. Ya. Klimovich、L. V. Korobchenko、M. N. Shashikhina、S. V. Zhavrid
DOI:10.1007/bf00759749
日期:1982.6
spectrum of biological activity. Methods have been developed [12-16] for the preparation of substituted 2-buten-4-olides with a variety of function&l substituents. In order to obtain new compounds containing the 2-buten-4-olide ring and to examine their antiviral activity, we have carried out some chemical reactions of 2-acylderivatives of 2-buten-4-olides (I-III), in whichthe lactone ring is conserved, as
Analgesic, anti-inflammatory, and antimicrobial activities of novel isoxazole/pyrimidine/pyrazole substituted benzimidazole analogs
作者:Krishna Veni Chikkula、Raja Sundararajan
DOI:10.1007/s00044-017-2000-0
日期:2017.11
ligation method. The relationship between chemical structure and biological activities of the test compounds were discussed. Among various tested compounds, 4-(2-(4-(1H-benzimidazol-2-yl)phenyl)hydrazono)-1-(4-chlorophenyl)-3-methyl-1H-pyrazol-5(4H)-one 10 was found to be most potent compound. This compound showed 72% analgesicactivity (20 mg/kg; second hour) and 67% protection in paw edema test (20 mg/kg;
Aldimines of Cardenolides and Cardenolide-Glycosides
作者:I. F. Makarevich、Yu. I. Gubin、R. Megges
DOI:10.1007/s10600-005-0142-7
日期:2005.5
New aldimines were synthesized from the cardenolide strophantidin and cardenolide-glycosides erysimin and cymarin and included morpholine, nitrile, pyridine, furan, hydroxy- and methoxyphenyl, piperidine, and other derivatives. An effective modified method for synthesizing aldimines was proposed. 52 new compounds were synthesized. Their structures were confirmed by IR and PMR spectra and elemental analysis.
Design, synthesis and anticancer evaluation of thieno[2,3-d]pyrimidine derivatives as dual EGFR/HER2 inhibitors and apoptosis inducers
作者:Souad A. Elmetwally、Khaled F. Saied、Ibrahim H. Eissa、Eslam B. Elkaeed
DOI:10.1016/j.bioorg.2019.102944
日期:2019.7
tyrosine kinase family is one of the most important targets in current cancer therapy regimens. In this study, we have designed and synthesized a series of thieno[2,3-d]pyrimidinederivatives as an EGFR and HER2 tyrosine kinase inhibitors. All the synthesized compounds were evaluated in vitro for their inhibitory activities against EGFRWT; and the most active compounds that showed promising IC50 values