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SYNTHESIS OF 3,4-DIPHENYL-1.3,4-DIAZAPHOSPHOLID1N-2-ONE-4-OXIDE BY MANNICH-TYPE REACTION 被引量:1
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作者 Ru Yu CHEN Ke Sheng FENG Institute of Elemento-Organic Chemistry,Nankai University,Tianjin 300071 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第1期11-14,共4页
Phenylurea reacted with dichlorophenylphosphine and aldehydes or ketones by Mannich-type reaction in anhydrous benzene to give five-mem- bered phosphorous heterocyclic compounds.However.derivatives of α-ureidoalkylph... Phenylurea reacted with dichlorophenylphosphine and aldehydes or ketones by Mannich-type reaction in anhydrous benzene to give five-mem- bered phosphorous heterocyclic compounds.However.derivatives of α-ureidoalkylphosphonic acids were obtained as the reaction performed in glacial acetic acid. 展开更多
关键词 NH JP IR HCH SYNTHESIS OF 3 4-diphenyl-1.3 4-DIAZAPHOSPHOLID1N-2-ONE-4-OXIDE BY MANNICH-TYPE REACTION ppm CCH
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Photo-induced Coupling Reaction of 1,1-Diphenyl-2,2-dicyanoethylene with 10-Methyl-9,10-dihydroacridine
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作者 HongJIANG YouChengLIU +3 位作者 GuanWuWANG ShiWeiLUO QuanMingWANG ThomasC.W.MAK 《Chinese Chemical Letters》 SCIE CAS CSCD 2004年第2期159-162,共4页
Diphenyl-2, 2-dicyanoethylene reacts with 10-methyl-9, 10-dihydroacridine in deaerated acetonitrile under irradiation with l>320 nm to give the coupling product 1, 1-diphenyl-1-(10-methyl-9-acridinyl)-2, 2-dicyanoe... Diphenyl-2, 2-dicyanoethylene reacts with 10-methyl-9, 10-dihydroacridine in deaerated acetonitrile under irradiation with l>320 nm to give the coupling product 1, 1-diphenyl-1-(10-methyl-9-acridinyl)-2, 2-dicyanoethane, which has been characterized by X-ray crystallographic, MS and NMR analyses. 展开更多
关键词 Photo-induced coupling reaction 1 1-diphenyl-2 2-dicyanoethylene 10-methyl-9 10-dihydroacridine 1 1-diphenyl-1-(10-methyl-9-acridinyl)-2 2-dicyanoethane.
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Synthesis and Crystal Structure of 1,2-Dis(1,3-diphenylpropan-2-yl)disulfane
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作者 冯附 黄猛 +4 位作者 王乾有 段正超 涂海洋 张爱东 胡卫兵 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第9期1275-1278,共4页
A novel compound of 1,2-dis(1,3-diphenylpropan-2-yl)disulfane(C30H30S2,Mr=454.27)was synthesized in ethanol with 1,3-diphenyl-2-propanone as raw materials,giving high yield of product(90%).Its structure was dete... A novel compound of 1,2-dis(1,3-diphenylpropan-2-yl)disulfane(C30H30S2,Mr=454.27)was synthesized in ethanol with 1,3-diphenyl-2-propanone as raw materials,giving high yield of product(90%).Its structure was determined by IR,1H NMR,MS,elemental analysis and X-ray diffraction.The crystal belongs to monoclinic,space group C2 with a=18.727(3),b=6.5179(9),c=13.7576(18),β=131.0610(10)o,V=1266.2(3)3,Z=2,Dc=2.136 g/cm3,μ=1.078 mm-1,F(000)=843,R=0.0490 and wR=0.1247 for 3211 observed reflections with I2(I).X-ray analysis reveals that the molecule is not symmetrical.There exist no classical hydrogen bonds andπ-πstacking interactions.Moreover,the thermal stability of compound 3 was investigated. 展开更多
关键词 1 3-diphenyl-2-propanone synthesis crystal structure
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Antioxidant Activity Evaluation in a Series of Heterocyclic Compounds Derived from 1,8-Diaminonaphthalene
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作者 Tuo Nanou Tiéba Kangah Niameke Jean Baptiste +4 位作者 Ballo Daouda Kablan Ahmont Landry Claude Kodjo Charles Guillaume Yapo Ossey Bernard Ziao Nahossé 《Journal of Biophysical Chemistry》 2021年第1期1-9,共9页
From (2,3-dihydro-1<i>H</i>-perimidin-2-yl)-phenyl, the substitution of OH group in <i>ortho</i> or <i>para</i> position on the phenyl ring, allows us to synthesize the studied comp... From (2,3-dihydro-1<i>H</i>-perimidin-2-yl)-phenyl, the substitution of OH group in <i>ortho</i> or <i>para</i> position on the phenyl ring, allows us to synthesize the studied compounds. These three compounds have been characterized by conventional spectroscopic methods (NMR and MS). The interest of this work is to review the antioxidant activity of our compounds. The antioxidant activity screening carried out according to FRAP and DPPH methods revealed significant anti-free radical properties for compounds 1 and 2 even at low concentrations. In contrast to the compound 2, compound 3 for which the OH group is substituted in <i>para</i> position has the lowest activity in both cases. Therefore the <i>para</i> position seems to be the least sensitive position to increase the antioxidant activity of this pharmacophore. 展开更多
关键词 PERIMIDINE SPECTROMETRY Antioxidant Activity 2 2-diphenyl-1-Picrylhydrazyl Method and Ferric Reducing Antioxidant Power Method
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Morphology Control over the Organic Nanoparticles of 1,3-Diphenyl-5-(9-anthryl)-2-pyrazoline
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作者 奚璐 肖德宝 +2 位作者 杨文胜 姚建年 张宝文 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2003年第12期1532-1535,共4页
The organic nanoparticles of a blue-light-emitting molecule,1,3-diphenyl-5-(9-anthryl)-2-pyrazoline,were prepared by reprecipitation method using acetonitrile as the solvent for the molecular precursor. Three morpholo... The organic nanoparticles of a blue-light-emitting molecule,1,3-diphenyl-5-(9-anthryl)-2-pyrazoline,were prepared by reprecipitation method using acetonitrile as the solvent for the molecular precursor. Three morphologies,spherical,doughnut-shaped and cubic,could be observed on the silicon substrate for the nanoparticles by the volume-controlled addition of acetonitrile. The evolution of particle morphology as a function of acetonitrile addition was attributed to the variation of the growth habits of the particles in the different environment. The nanoparticles exhibit the novel photoluminescence spectra as compared to those of monomer and the bulk crystals. 展开更多
关键词 organic nanoparticles morphology control reprecipitation method 1 3-diphenyl-5-(9-anthryl)-2-pyrazoline PHOTOLUMINESCENCE
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Synthesis of a New β-Mercaptoalcohol 被引量:1
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作者 Jian Feng GE Li Fen ZHANG +1 位作者 Zong Xuan SHEN Ya Wen ZHANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第7期569-570,共2页
In this letter, (R)-1,1-diphenyl-2-mercapto-3-methyl-1-butanol was synthesized from L-valine and two synthetic routes have been tried.
关键词 R)-1 1-diphenyl-2-mercapto-3-methyl-1-butanol asymmetric synthesis L-valine.
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A Comparative Study of Antioxidant Activities between Fresh and Dry Mushrooms in the Genera <i>Cantharellus</i>and <i>Afrocantharellus</i>from Tanzania
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作者 Donatha Damian Tibuhwa 《Food and Nutrition Sciences》 2014年第2期212-221,共10页
Cantharellus and Afrocantharellus mushrooms are widely consumed in both fresh and dry forms. However, their antioxidant and whether their values changing with drying processes are not known. This study establishes the... Cantharellus and Afrocantharellus mushrooms are widely consumed in both fresh and dry forms. However, their antioxidant and whether their values changing with drying processes are not known. This study establishes their values and the effect of sun drying on their quality and quantity. Methanolic extracts of five Cantharellus and two Afrocantharellus species were investigated. The investigation used (1,1-diphenyl-2-picrylhydrazyl radical) DPPH as a substrate to determine radical scavenging abilities. Further quantitative analyses for carotenoids, flavonoid, total phenolic compounds and vitamin C content were done using spectrophotometric assay at 515 nm. Comparatively, fresh mushroom had higher vitamin C and Lycopene contents than their dry counterparts with β-carotene. Flavonoid and phenolic compounds were higher in dry forms than those in their fresh counterparts. Radical scavenging ability also varied with fresh forms depicting higher activity compared to dry forms. The variation was low in Afrocantharellus species (0.8% and 0.99%) while it was higher in Cantharellus species (24.12% and 7.52%). The highest ability was observed in fresh forms of Cantharellus pseudocibarius (EC50 50 = 0.4 mg/ml) was from dry form of Cantharellus rufopunctatus. This shows that studied mushrooms are rich in antioxidants and their quality and quantities are affected differently in both forms. Both dry and fresh mushrooms are potential sources of natural antioxidants. The portrayed high scavenging ability by these mushrooms envisages promoting them into potential nutraceutics. 展开更多
关键词 ANTIOXIDANT Activity FRESH MUSHROOMS Sun-Dried MUSHROOMS Afrocantharellus Cantharellus 1 1-diphenyl-2-picrylhydrazyl
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Synthesis of 3,3,5,5-tetrabenzyl-1,2,4-trithiol and 1,2-dis(1,3-arylpropan-2-yl)disulfane
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作者 Fu Feng Meng Huang +1 位作者 Zheng-Chao Duan Wei-Bing Hu 《Chinese Chemical Letters》 SCIE CAS CSCD 2013年第10期909-911,共3页
Novel sulfur-containing compounds (3a-3c, 4a-4c) were obtained in ethanol with 1,3-diphenyl-2- propanone as the starting material. The advantages of this procedure were mild reaction conditions, simple protocol, and... Novel sulfur-containing compounds (3a-3c, 4a-4c) were obtained in ethanol with 1,3-diphenyl-2- propanone as the starting material. The advantages of this procedure were mild reaction conditions, simple protocol, and high yields. The structures of the products were characterized by IR, 1H NMR, MS and elementary analysis. The crystal of the new compound 4a belongs to monoclinic, space group C2 with a=18.727(3), b=6.5179(9), c=13.7576(18) A, fl=131.0610(10)°, V=I266.2(3)A3, Z=2, Dc=2.136g/cm3, μ=1.078mm 1, F(000)=843, R=0.0490 and wR=0.1247 for 3211 observed reflection with I 〉 2σ(I). X-ray analysis reveals that the molecule is not symmetrical, the molecular structure is stabilized by weak π-π stacking interactions, and no classical hydrogen bonds can be observed. 展开更多
关键词 1 3-diphenyl-2-propanone Synthesis Sulfur-containing compounds
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The Application of Novel Electrochemical Approach to Antioxidant Activity Assay of Metal Porphyrins with Bulky 3,5-Diisobornyl-4-hydroxyphenyl Moieties
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作者 Tatyana Rocheva Vladimir Tyurin +6 位作者 Dmitrii Belykh Аnna Moiseeva Jingwei Zhang Еvgeny Buravlev Irina Chukicheva Alexander Alexander Kutchin Elena Milaeva 《American Journal of Analytical Chemistry》 2014年第15期1028-1036,共9页
The complexes of biogenic metals (Zn2+,Cu2+,Co2+,Mn3+,Fe3+) based on meso-tetra(3,5-diisobor- nyl-4-hydroxyphenyl)porphyrin 1 were synthesized. The electrochemical behavior of these com-pounds was studied using cyclic... The complexes of biogenic metals (Zn2+,Cu2+,Co2+,Mn3+,Fe3+) based on meso-tetra(3,5-diisobor- nyl-4-hydroxyphenyl)porphyrin 1 were synthesized. The electrochemical behavior of these com-pounds was studied using cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The antioxidant activity of complexes was estimated by means of the electrochemical assay based on the hydrogen atom transfer reaction to the stable radical 2,2’-diphenyl-1-picrylhydrazyl (DPPH). The RDE method was applied for this process monitoring. It was shown that the efficiency of the metal complexes (Cu2+,Co2+,Mn2+,Ni2+,Fe3+) is practically the same order as that of free base porphyrin 1. However the Zn2+ complex demonstrates significantly higher antioxidant activity, and the stoichiometry of the reaction was determined as σ = 4. The results demonstrate that porphyrin macrocycle can directly affect the antioxidant properties of 2,6-diisobornylphenol. 展开更多
关键词 METAL PORPHYRINS Cyclic VOLTAMMETRY Rotating Disk Electrode 2 2-diphenyl-1-picrylhydrazyl ANTIOXIDANT Activity
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Effect of Induced Mutation on Antioxidant Activity in Ocimum basilicum Linn
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作者 Isaac Kojo Asante Kofi Annan +1 位作者 Matthew Kweku Essilfie Valentine Tater 《Natural Science》 2016年第4期192-195,共4页
Five batches from the same stock of seeds of Ocimum basilicum were irradiated at 5, 10, 15, 20 and 25 Gy, respectively using <sup>60</sup>C source. Methanolic leaf extracts of these samples and a control w... Five batches from the same stock of seeds of Ocimum basilicum were irradiated at 5, 10, 15, 20 and 25 Gy, respectively using <sup>60</sup>C source. Methanolic leaf extracts of these samples and a control were evaluated for their antioxidant activity by the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging method using M<sub>2</sub> plants. All the methanolic extracts showed antioxidant activity. The IC<sub>50</sub> of the methanolic extracts of the six different treatments, control, 5 Gy, 10 Gy, 15 Gy, 20 Gy and 25 Gy, showed antioxidant activity with IC<sub>50</sub> values of 100, 90, 86, 61, 71 and 70 μg/ml, respectively. Three individual mutants, M-15-5, M-20-6 and M-15-4, had IC<sub>50</sub> values of 26, 30 and 40 μg/ml, respectively. These mutants were from the 15 Gy and 20 Gy treatments. From the results, it is confirmed that induced mutation can be employed to create variation in the levels of free radical scavenging activity in O. basilicum and can therefore serve as a tool for breeding for high levels of antioxidant activity in O. basilicum. 展开更多
关键词 Ocimum basilicum Nonirradiated Irradiated Antioxidant Activity MUTANT 1 1-diphenyl-2-picryl-hydrazyl
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Comparison of Antioxidant Activities of Silver Nanoparticles and Methanol Extracts of Three Indigenous Nigeria Herbal Seeds
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作者 Prisca Nneka Onuoha Nuria Chinonyerem Oganezi +2 位作者 Christopher Uche Okoronkwo Uzoaga Linda Nkiruka Peter Azikiwe Onwualu 《Food and Nutrition Sciences》 CAS 2022年第7期702-719,共18页
The antioxidant of seeds was carried out using extracts from methanol and Silver Nanoparticles from the spice. The SEM shows the shapes, dispersion and agglomeration of the sample, while the EDX confirms the SEM and t... The antioxidant of seeds was carried out using extracts from methanol and Silver Nanoparticles from the spice. The SEM shows the shapes, dispersion and agglomeration of the sample, while the EDX confirms the SEM and the presence of some compounds. The FT-IR reveals the AgNP<sub>s</sub> capping and reducing the particular biomolecule from the functional group for identification. Compounds found in the FT-IR seeds of Capsicum annum are Ag L (Silver iodide), C K (Cyanogen chloride), P K (Phenol). Monodora myristica are Mo L (Molybdenum), Ag L (Silver iodide), C K (Cyanogen chloride), P K (Phenol), Mg K (Magnesium). Piper guineense are Ag L (Silver iodide), Ci K (Potassium chloride), C K (Cyanogen chloride), P K (Phenol). The seeds show that the AgNP<sub>S</sub> of CA and MM has a better antioxidant activity than the methanol of CA and MM, while the PG methanol has a better activity than the AgNP<sub>S</sub> PG. The control (Catechin and Galic acid) has a slight overall better DPPH activity than the AgNP<sub>S</sub>. It is important to note that there is a concentration dependency in CA, MM AgNP<sub>S,</sub> PG methanol respectively. Notably, at CA methanol, the conc. at 125 was higher than the conc. at 250. Hence, there is need to create a great part in using plant samples for making tabulated or capsulated drugs for treatment of diseases and using plant silver nanoparticles to develop a healthy food/drug preservative package material “smart packaging” that will enhance shelf-life. 展开更多
关键词 Piper guineense (PG) or Uziza Monodora myristica (MM) or Ehuru and Capsicum annum (CA) or Cayenne Pepper Scanning Electron Microscope/Energy Dispersive X-Ray (SEM/EDX) Silver Nanoparticles (AgNPs) Fourier-Transform Infrared (FT-IR) 2 2-diphenyl-1-Picryl-Hydrazyl Radical Scavenging (DPPH) Silver Nitrate (AgNO3)
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