3-Aryl-5-[(aryloxy)methyl]-3-[(1H-1,2,4-triazol-1-yl)methyl]-2-methylisoxazolidine derivatives. Synthesis and antifungal activity

The synthesis and antifungal activity of a novel series of 3-aryl-5-[(aryloxy)methyl]-3-[(1H-1,2,4-triazol-1-yl)-methyl]-2-methylisoxazolidines are described. The in vitro activity was evaluated in solid agar cultures against a variety of dermatophytes and yeast fungi, while in vivo activity was measured in an immune-compromised mouse model of systemic candidiasis. The activity of the title series was compared to that of ketoconazole and one derivative, the cis-3-(4-chlorophenyl)-5-(4-chlorophenyloxy)methyl analogue 5f was found to possess a similar potency in the in vivo assay. Structure-activity relationship correlations are also discussed.     

Molecular structures of methyl 4-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]-1-methyl-1H-pyrazol-5-carboxylate and methyl 4-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]-1-methyl-1H-pyrazol-3-carboxylate

The structure of methyl 4-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]-1-methyl-1H-pyrazol-5-carboxylate is determined by X-ray crystallography and further used to elucidate the structure of methyl 4-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]-1-methyl-1H-pyrazol-3-carboxylate, using the data of homo- and heteronuclear 2D NMR correlation spectroscopy.     

2-芳基-5-[(4-芳基噻唑-2-基)甲基]-1,3,4-噁二唑的合成

以硫代酰胺和α-溴代酮为原料,经4步反应合成了N,N′-二酰基肼(6),6在POCl3作用下脱水环化,合成了7个未见文献报道的2-芳基-5-[(4-芳基噻唑-2-基)甲基]-1,3,4-噁二唑类化合物,其结构经1H NMR,IR,MS和元素分析表征。     

Epoxy derivatives of {(5-[(1-Phenylethyl)aminocarbonyl]-cyclopent-2-en-1-yl}methyl acetates

Diastereoisomeric [(1R,5S)-5-“[(1R)-1-phenylethyl]aminocarbonyl”cyclopent-2-en-1-yl]methyl acetate and [(1S,5R)-5-“[(1R)-1-phenylethyl]aminocarbonyl”cyclopent-2-en-1-yl]methyl acetate reacted with m-chloroperoxybenzoic acid to give the corresponding stereoisomeric α- and β-epoxy derivatives, which were identified on the basis of their spectral parameters.     

Synthesis and structure of N-(4,6-dimethylpyrimidin-2-yl)-2-(5-phenyl-2H-tetrazol-2-yl)acetohydrazide and 1-(4,6-dimethylpyrimidin-2-yl)-3-[(5-phenyl-2H-tetrazol-2-yl)methyl]-1H-pyrazol-5-ol

Russian Journal of Organic Chemistry - New tetrazolyl derivatives of pyrimidine were synthesized containing various linker groups. The structure of these compounds was established by NMR...     

Spectrophotometric determination of uranium with 1-[(5-Methyl-2-pyridyl)azo]-2-naphthol

Summary Uranium(VI) reacts with 1-[(5-methyl-2-pyridyl)azo]-2-naphthol (5-Me--PAN) in aqueous solution. The complex can be extracted with chloroform at pH 7.0–11.5 to give a red solution with an absorbance peak at 560 nm. The color is stable and the system conforms to Beer's law at the range of 1.5–8 ppm uranium in chloroform layer. Common anions and cations do not interfere. Large amounts of interfering cations can be masked by potassium cyanide, EDTA or triethanolamine. The proposed method is a selective procedure for the determination of uranium. The molar absorptivity in the chloroform extract is 2.1×10⁴ l mole^–1 cm^–1 at 560 nm.

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Zusammenfassung Uran(VI) reagiert mit 1-[(5-Methyl-2-pyridyl)azo]-2-naphthol(5-Me--PAN) in wäßriger Lösung unter Bildung einer mit Chloroform bei pH 7,0–11,5 extrahierbaren, roten Komplexverbindung mit einem Absorptionsmaximum bei 560 nm. Die Färbung ist beständig und folgt dem Beerschen Gesetz zwischen 1,5 und 8 ppm Uran. Die üblichen Ionen stören nicht. Große Mengen störender Kationen können mit Kaliumcyanid, ÄDTA oder Triäthanolamin maskiert werden. Die vorgeschlagene Methode ist für die Uranbestimmung selektiv. Die molare Extinktion des Chloroformextraktes beträgt 2,1×10⁴ l·Mol·^–1 cm^–1 bei 560 nm.

     

Theoretical study on the geometry and vibration of 1-[6-(4-Chlorophenyl)-1-[(6-chloropyridin-3-yl)methyl]-2-[(6-chloropyridin-3-yl)methylsulfanyl]-4-methyl-1,6-dihydropyrimidin-5-yl]ethanone

The solid phase FT-IR and FT-Raman spectra of 1-[6-(4-chlorophenyl)-1-[(6-chloropyridin-3-yl)methyl]-2-[(6-chloropyridin-3-yl)methylsulfanyl]-4-methyl-1,6-dihydropyrimidin-5-yl]ethanone (C25H21Cl3N4OS) were recorded in the region 4000-400 and 3500-100cm(-1), respectively. The vibrational spectra have been computed using density functional theory (B3LYP) and ab initio molecular orbital calculation (HF) with 6-31G(d, p) basis sets. A close agreement was achieved between the observed and calculated frequency by employing normal coordinate calculations. The observed and simulated spectra were found to be well comparable.     

苯甲酸（1H－1，2，4－三唑－1－基）－3，3－二甲基－2－丁酮酯衍生物的合成

用冠醚作催化剂，通过苯甲酸盐同１－溴代－１－（１Ｈ－１，２，４－三唑－１－基）－３．３－二甲基丁酮－２－反应，合成了一系列苯甲酸（１Ｈ－１，２，４－三唑－１－基）－３，３－二甲基－２－丁酮酯类新化合物，并对合成方法进行了探讨。通过ＩＲ、￣１ＨＮＭＲ及元素分析，确定了化合物的结构。     

Studies on Antifungal Agents. Part 22. 3-aryl-5-[(aryloxy)alkyl]-3-[(1H-imidazol-1-yl)methyl]-2-methylisoxazolidines and related derivatives

The synthesis and antifungal activity of a novel series of 3-aryl-5-[(aryloxy)alkyl]-3-[(1H-imidazol-1-yl)-methyl]-2-methylisoxazolidines and related compounds, are discussed. The synthesis of the title compounds was accomplished via a 1,3-dipolar cycloaddition of α-substituted ketonitrones with l-alkenyl phenyl ethers (Scheme 2 and 3). The compounds were evaluated for in vitro antifungal activity in solid agar cultures against a broad variety of yeast and systemic mycoses and dermatophytes. While antifungal activity was evident throughout the series, in general, derivatives having halogen atom(s) in either or both aryl rings demonstrated the highest potency, especially against Trichophyton rubrum and Candida albicans. The dichloro analog 20 (PR 967-248) was found to possess the most useful activity. Its minimum inhibitory concentration (MIC) values ranged between 0.2 and 2.0 μg/ml, as compared to 0.2–20.0 μg/ml for the standard drug ketoconazole (4).     

Synthesis and properties of 1-[(adamantan-1-yl)methyl]-3-pyrazolyl ureas

Chemistry of Heterocyclic Compounds - A series of 1,3-disubstituted ureas containing 1,3,5-trisubstituted pyrazole and (adamantan-1-yl)methyl fragments were synthesized in the reaction of...     

Recyclization of 2-(3,6-diaryl-2,5-dihydropyridazin-4-yl)-1H-benzimidazoles to 2-[(3,5-diarylpyrazol-4-yl)methyl]-1H-benzimidazoles

2-(3,6-Diaryl-2,5-dihydropyridazin-4-yl)-1H-benzimidazoles undergo a previously unknown type of recyclization of the pyridazine ring to a pyrazole to give 2-[(3,5-diarylpyrazol-4-yl)methyl]-1H-benzimidazoles. It is suggested that the mechanism of this conversion, which includes formation of a secondary enhydrazine group in the diazine ring and its subsequent contraction, occurs after the intramolecular formation and opening of a cyclopropane ring. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 853–861, June, 2008.     

Synthesis and QSAR studies on 1-[(5-substituted-1,3,4-thiadiazol-2-yl)methyl]-1H-1,2,4-triazole as antifungal agents

A series of 1-[(1,3,4-thiadiazol-2-yl)methyl]-1H-1,2,4-triazole derivatives were prepared and evaluated for their antifungal activities. The chemical structures of these compounds were determined by means of elemental analyses, ¹H NMR, and X-ray crystallography. Quantitative structure–activity relationship (QSAR) studies were performed on these compounds using physicochemical parameters as independent parameters and antifungal activity as a dependent parameter, where antifungal activity correlated best (r > 0.9) with hydrophobic parameters (π) and indicator (H). Moreover, the results are interpreted on the basis of a multiple regression model. The model has been internally and externally validated. Furthermore, the domain of applicability which indicates the area of reliable predictions is defined.     

Synthesis and antitumor activity of 3-[(methyl)bis(5-trialkylsilyl-furan-2-yl)silyl]propylamines

Novel 3-[(methyl)bis(5-trialkylsilylfuran-2-yl)silyl]propylamines have been synthesized by a hydrosilylation reaction of aliphatic and heterocyclic N-allylamines in the presence of the Speier's catalyst. The effects of the structure of the amine and the alkyl substituent at the silicon atom on the cytotoxicity of the compounds have been studied.     

Synthesis of 6-Methyl-4-(1-methyl-2-buten-1-yl)-2-(2-cyclohexen-1-yl)- and 6-Methyl-4-(1-methyl-2-buten-1-yl)-2-(1-cyclohexen-1-yl)anilines

Alkenylation of 6-methyl-2-(2-cyclohexen-1-yl)- and 2-(1-cyclohexen-1-yl)anilines with piperylene in the presence of AlCl₃ and transformation of the resulting cyclohexenylanilines into carbazole structures were studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 3, 2005, pp. 441–443.Original Russian Text Copyright © 2005 by Gataullin, Ishberdina, Sotnikov, Abdrakhmanov.