Synthesis and spectral luminescence properties of 2-aryl-5-methyl-1,3,4-oxadiazoles and zinc(ii) 2-(2-hydroxyphenyl)-5-methyl-1,3,4-oxadiazole complex

Russian Chemical Bulletin - 2-Aryl-5-methyl-1,3,4-oxadiazoles were synthesized by reflux of equimolar amounts of acyl hydrazides with triethyl orthoacetate in o-xylene. The obtained oxadiazoles,...     

2-对氯苯氧基-5-芳基-1,3,4-噁二唑的合成

对氯苯氧乙酸乙酯与水合肼反应制得对甲基苯氧乙酰肼（2）;以碳酸钠作缚酸剂,2与卤代苯甲酰氯反应合成了N、N＇-二酰基肼（3）;在POCl3作用下,3脱水环化得2-对氯苯氧基-5-芳基-1,3,4-噁二唑,其结构经1^H NMR,IR,MS和元素分析表征,并对其裂解途径进行了探讨。     

2-苯基-5-芳基-1,3,4-噁二唑的合成与表征

苯甲酸乙酯与水合肼反应制得苯甲酰肼(1),1再分别与芳酰氯反应制得N、N′-二酰基肼(3a～3i),3a～3i在POCl3作用下脱水环化生成2-苯基-5-芳基-1,3,4-噁二唑(4a～4i)。其结构经元素分析,IR,^1H NMR和MS表征,并对其裂解途径进行了探讨。     

2-对硝基苯基-5-芳基-1,3,4-噁二唑的合成与表征

以自制的N,N′-二酰基肼在POCl3作用下脱水环化,合成了8个2-对硝基苯基-5-芳基-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,并对其裂解途径进行了探讨。     

2-(2-三氟苯基)-5-芳基-1,3,4-噁二唑类化合物的合成

2-三氟苯甲酰肼与芳酰氯反应制得N,N′-二酰肼(2)。2在三氯氧磷存在下脱水闭环,合成了一系列2-(2-三氟苯基)-5-芳基-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。     

2-(4-吡啶基)-5-芳基-1,3,4-噁二唑的合成与表征

以碳酸钠为缚酸剂,4-吡啶甲酰肼与苯甲酰氯反应得N,N＇-二酰基肼,后者在POCl3作用下脱水环化成2-（4-吡啶基）-5-芳基-1,3,4-噁二唑,其结构经^1H NMR,IR,MS和元素分析确认,并对其裂解途径进行了探讨。     

2-(1-溴-2-萘氧甲基)-5-芳基-1,3,4-噁二唑的合成与表征

以碳酸钠作缚酸剂,1-溴-2-萘氧甲酰肼与芳酰氯反应制得N,N′-二酰基肼,后者在POCI3作用下脱水环化成2-(1-溴-2-萘氧甲基)5-芳基-1,3,4-噁二唑。其结构经^1H NMR,IR,MS和表征元素分析,并对其裂解途径进行了探讨。     

2-芳基-5-苄氧苯基-1,3,4-噁二唑类化合物的合成

由苄氧基苯甲酰肼与各种芳酰氯反应制得N-取代苯甲酰基-4-苄氧苯酰肼(2),2在三氯氧磷存在下发生脱水闭环反应,合成了一系列2-芳基-5-苄氧苯基-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。     

2-芳氧基-5-苯基-1,3,4-恶二唑类化合物的合成

通过芳氧基负离子在2-甲磺酰基-5-1,3,4-恶二唑上的亲核取代反应制得2-芳氧基-5-苯基-1,3,4-恶二唑.所有化合物的结构经元素分析,IR, ^1H NMR和MS确证.这些化合物表现出一定的抑制枯草芽孢杆菌繁殖的活性.     

Synthesis of 5-Trimethylsilylethynyl-1,3,4-oxadiazoles

5-Trimethylsilylethynyl-2-R-1,3,4-oxadiazoles were synthesized for the first time by intramolecular cyclocondensation of unsymmetrical N-acyl-N'-(3-trimethylsilyl-2-propynoyl)hydrazines by the action of phosphoryl chloride.     

2-取代氨基-5-吡唑基-1,3,4-噁二唑的合成及生物活性

取代氨基吡唑基噁二唑;2-取代氨基-5-吡唑基-1;3;4-噁二唑的合成及生物活性     

Reaction of 2-amino-5-aryl-1,3,4-oxadiazoles with compounds with activated double bonds

The reaction of 2-amino-5-aryl-1,3,4-oxadiazoles with unsaturated acids and their chlorides was studied. It was shown by IR spectroscopy and mass spectrometry that acylation with acrylic, methacrylic, and cinnamic acid chlorides takes place at the nitrogen atom of the exocyclic amino group. Depending on the solvent, two reaction pathways are realized with unsaturated acids: acylation of the starting 2-amino-5-aryl-1,3,4-oxadiazole occurs in bromobenzene, while nucleophilic addition to the unsaturated acid molecule is realized in DMF in the presence of potassium hydroxide.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 825–829, June, 1990.     

Polarographic examination of 5-aryl-2-(2-thienyl)-oxazoles and -1,3,4-oxadiazoles

The polarographic behavior of 5-aryl-2-(2-thienyl)oxazoles and -1,3,4-oxadiazoles has been studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1550–1552, November, 1986.     

Synthesis and Spectral-Luminescent Properties of 2-Aryl-5-butyl-1,3,4-oxadiazoles

Russian Journal of General Chemistry - 2-Aryl-5-butyl-1,3,4-oxadiazoles have been obtained in 59–85% yield via refluxing of equimolar amounts of a benzoic acid hydrazide with trimethyl...     

Synthesis of 2-Chloromethyl-5-aryl-, 2-Chloromethyl-5-(5-methyl-2-furyl)-, and 2-Chloromethyl-5-(1,5-dimethyl-2-pyrrolyl)-1,3,4-oxadiazoles from Tetrazole Derivatives

Acetylation of 5-aryltetrazoles, 5-(5-methyl-2-furyl)tetrazole, and 5-(1,5-dimethyl-2-pyrrolyl)tetrazole with chloroacetyl chloride was studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 5, 2005, pp. 787–789.Original Russian Text Copyright © 2005 by Baranov, Tsypin, Malin, Laskin.     

2-取代-5-吡唑基-1，3，4-恶二唑类化合物的合成及生物活性

以5-吡唑甲酰肼和取代羧酸为起始物,运用"一锅煮"法合成了一系列2-取代-5-吡唑基-1,3,4-二唑.此外,还合成了1-苯酰基-2-吡唑酰基肼.初步生物活性测定结果表明,部分化合物有较好的杀菌和除草活性.     

Synthesis and spectral properties of 1-aryl-2-formylpyrroles

Various 1-aryl-2-formylpyrroles were synthesized by reaction of furfurol with substituted anilines. For p-bromo- and p-chlorophenylsubstituents, the intermediate Schiff bases were isolated.Deceased.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 180–184, February, 1989.     

Synthesis and anticonvulsant activity of 2-aryl-3,4-dialkyltetrahydro-1,3,4-oxadiazines and 2-aryl-3,4-dialkyltetrahydro-1,3,4-oxadiazin-5-ones

Several 2-aryl-3,4-dialkyltetrahydro-1,3,4-oxadiazines have been synthesized from 2-(1,2-dialkylhydrazino)ethanol (2) and aromatic aldehydes. Also, three 2-aryl-3,4-dialkyltetrahydro-1,3,4-oxadiazin-5-ones were obtained from the reaction of 1,2-dialkylglycolylhydrazine (5) and aromatic aldehydes. These compounds exhibited activity in the maximal electroshock seizure test.