Synthesis and Antibacterial Activities of 4—Amino—3—（1—aryl—5—methyl—1,2,3—triazol—4—yl）—5—mercapto—1,2,4—triazoles／2—Amino—5—（1—aryl—5—methyl—1,2,3—triazol—4—yl）—1,3,4—

Treatment of 4-amino-3-(1-aryl-5-methyl-1,2,3-triazol-4-yl)-5-mercapto-1,2,4-triazoles/2-amino-5-(1-aryl-5-methyl-1,2,3-triazole-4-yl)-1,3,4-thiadiazoles with benzaldehyde,acetone and ω-bromoacetophenone was tested and compared.The title compounds Schiff bases,amides,imidazolo [2,1-b]-1,3,4-thiadiazoles and 7H-s-triazolo[3,4-b]-1,3,4-thiadiazines have been confirmed by elemental analyses,^1H NMR,IR and MS spectra.All the compounds have also been screened for their antibacterial activities against B.subtilis,S.aureus and E.coli.     

3,3—二甲基—9—（5,5—二甲基—3—羟基—2—环己烯—1—酮—2—基）—1—氧代—2 …

标题化合物Ｃ２３Ｈ２６Ｏ４是水杨醛与５，６－二甲基－１，３－环己二酮在Ｎ，Ｎ－二甲基甲酰胺中反应而得。结果通过单晶Ｘ－射线衍射法确定，其晶体属于单斜晶系，空间群Ｐ２１／ｃ，ａ＝７．０５６，ｂ＝２０．２６３，ｃ＝１３．６６５Ａ，β＝９３．３２，Ｖ＝１９５０．７Ａ＾３，Ｍｒ＝３６６．４６，Ｄｃ＝１．２４８ｇ／ｃｍ＾３，Ｚ＝４，μ（ＭＯＫα）＝０．８４ｃｍ＾－１，Ｆ（０００）＝７８４。晶体结构用直接法解     

1—芳基—2—苯基—3—甲基—3—异丙基—2—氧代—1,4,2—二氮磷杂？…

利用取代苯基脲与苯基二氮化膦和３－甲基－２－丁酮进行的类Ｍａｎｎｉｃｈ反应合成了１５种新的１,４,２－二氮磷杂环戊－５－酮类化合物（２ａ－２ｏ）,其结构经＾１Ｈ ＮＭＲ,ＩＲ,ＭＳ和元素分析证实,根据ＮＭＲ谱分析,反应主要生成顺式几何异构体,除草活性测试表明,目标化合物对阔叶杂草具有很好的选择性草活性,并对其结构与除草活性关系进行了讨论。     

Synthesis of 3—Biaryl—1—ferrocenyl—2—propene—1—ones

The novel structures of organometallic compounds 3-biaryl-1-ferrocenyl-2-propene-1-ones 5 were synthesized for nonlinear optical chromophores by Suzuki cross-coupling reaction.Their structures were determined with elemental analyses,^1H NMR spectra and ^13C NMR spectra.     

Crystal and Molecular Structure of N—Phenyl 1—Methoxycarbonylmethyl—3—benzyl—1,2,3,4—tetrahydro—4—oxo—1,3,2—benzodiazaphosphorin—2—thiocarboxamide 2—Oxide

1 INTRODUCTIONOrganophosphorus compounds are ubiquitous in nature and they have broad applications in the fields of agriculture and medicine. During the past two decades, (-ketophosphonates and their derivatives containing sulfur have attracted considerable attention because these compounds are endowed with special physical, chemical and pharmacological properties due to the proximity of the carbonyl and the phosphoryl groups[1～8]. In the study on new pharmacenticals and agrochemicals, th…     

4—取代苯基—6—甲基—5—硫代—1,2,4—三嗪—3—酮的合成

合成了一系列新的４，６－二取代－５－硫代－１，２，４－三嗪－３－酮类化合物，并用元素分析、ＩＲ、＾１Ｈ ＮＭＲ及ＭＳ对其结构进行了表征。     

2-(5-Bromo-2-furyl)quinoxaline and 3-(5-bromo-2-furyl)-2-quinoxalone

2-(5-Bromo-2-furyl)quinoxaline and 3-(5-bromo-2-furyl)-2-quinoxalone were obtained by the action of bromine on the corresponding quinoxaline derivatives and also by condensation of o-phenylenediamine with, respectively, (5-bromo-2-furyl)glyoxal or (5-bromo-2-furyl)glyoxylic acid esters.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 404–406, March, 1973.     

Determination of titanium by adsorption-voltammetry with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)-phenol (5-Br-PADAP)

Summary The 1:1 complex between titanium (IV) and 5-Br-PADAP can be used to determine titanium by adsorption voltammetry at a stationary Hg-electrode. The experimental conditions for the determination are described. The detection limit is 3×10^–10 mol/l Ti (0.015 ppb). Calibration curves are linear for solutions containing 4×10^–10 to 5×10^–8 mol/l Ti(IV) and an enrichment time of 3 min. The influence of foreign ions was investigated. The determination can be carried out in the presence of a 5000-fold excess of iron.     

5-Br-PADAP为显色剂吸光光度法测定微量重铬酸根的研究

研究了 2 (5 溴 2 吡啶偶氮 ) 5 二乙氨基酚 (5 Br PADAP)在硫酸介质中质子化后与Cr2 O2 - 7形成二元离子缔合物的最佳条件 ,提出了测定微量Cr2 O2 - 7的吸光光度新方法 ,表观摩尔吸光系数ε580 =1.1× 10 5L·mol- 1·cm- 1。Cr2 O2 - 7浓度范围为 0～ 6 .2 4 μg·ml- 1。缔合物组成比为n(5 Br PADAP)∶n(Cr2 O2 - 7) =1∶1,方法应用于合金钢中铬的测定 ,结果满意     

Bioanalysis of (E)-5-(2-bromovinyl)-2'-deoxyuridine

(E)-5-(2-Bromovinyl)-2'-deoxyuridine is an antiviral drug that is experimentally used for modulation of the antitumour effect of fluoropyrimidines, such as ftorafur and 5-fluorouracil. The isolation of the analyte, in the presence of 5-fluorouracil, from the matrix is performed either by means of a simple protein precipitation (plasma) or by means of a liquid-liquid extraction with ethyl acetate (urine). Following pretreatment, the analyte is analysed by reversed-phase chromatography and quantified by absorbance detection at 307 nm. The minimum detectable concentration in plasma and urine samples is ca. 6 ng/ml. The recovery after deproteination of plasma samples is 75%, while after liquid-liquid extraction of urine the recovery amounts 92%. The degree of protein binding of the analyte, measured by ultrafiltration, is found to be 97%. These data allow the bioanalysis of (E)-5-(2-bromovinyl)-2'-deoxyuridine for pharmacokinetic studies.     

Spectrophotometric determination of gadolinium(III) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP)

Reaction between gadolinium(III) and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5- Br-PADAP) was studied for delineating optimal conditions for complexation. This reagent can be used for the spectrophotometric determination of Gd(III) in concentrations ranging from 0.04 to 1.2 ppm (a = 1.76(+/- 0.03) x 10(5) (1.(-1) mole(-1). cm). The reaction takes place at a pH between 9.2 and 11.6. In the presence of Triton X-100 this complex is soluble in water. In order to overcome difficulties caused by the presence of other lanthanides, an ion exchange chromatographic technique was used.