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三萜类化合物Bardoxolone methyl对急性呼吸窘迫综合征大鼠氧化应激信号通路Nrf2-ARE/HO-1的影响 被引量:1
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作者 谭国良 刘玉琪 《中国急救医学》 CAS CSCD 北大核心 2019年第3期269-273,共5页
目的观察三萜类化合物Bardoxolone methyl(BARD)对急性呼吸窘迫综合征(ARDS)大鼠氧化应激信号通路核转录因子相关因子2(Nrf2-ARE)/血红素氧合酶-1(HO-1)的影响。方法100只大鼠按随机数字法分为药物BARD组及生理盐水组,喂养一周后两组按... 目的观察三萜类化合物Bardoxolone methyl(BARD)对急性呼吸窘迫综合征(ARDS)大鼠氧化应激信号通路核转录因子相关因子2(Nrf2-ARE)/血红素氧合酶-1(HO-1)的影响。方法100只大鼠按随机数字法分为药物BARD组及生理盐水组,喂养一周后两组按是否建立ARDS模型再各分为两亚组,产生四组:ARDS模型+BARD干预组(A1组),ARDS模型+生理盐水组(A2组),正常+BARD干预组(B1组),正常+生理盐水组(B2组)。各组大鼠再喂养72h后处死留取肺组织及血液标本。病理观察肺组织结构变化。免疫组织化学检测肺组织Nrf2、HO-1蛋白表达情况。反转录-多聚酶链反应(RT-PCR)检测肺组织Nrf2 mRNA、HO-1 mRNA表达情况。结果肺组织病理结构变化:A2组肺组织损伤程度最重,病理评分最高。其次A1组,B1及B2组结构大致正常。Nrf2、HO-1蛋白表达情况:A1组(3.78±0.37,2.86±0.16)及B1组(3.01±0.34,2.47±0.19)高于A2(1.82±0.31,2.01±0.21)及B2组(0.92±0.13,1.41±0.17),A1组高于B1组,A2组高于B2组(P均<0.05)。Nrf2mRNA、HO-1mRNA表达情况:A1组(2.16±0.17,1.45±0.12)最为明显,B1组(1.79±0.14,1.18±0.05)高于B2组(0.42±0.06,0.68±0.11),A2组(1.18±0.19,1.01±0.07)高于B2组(0.42±0.06,0.68±0.11,P均<0.05)。结论三萜类化合物Bardoxolone methyl能够明显上调肺组织Nrf2-ARE/HO-1信号通路相关蛋白的表达,从而发挥抗氧化应激作用,减轻ARDS时肺组织的损伤。 展开更多
关键词 三萜类化合物 Bardoxolone methyl 急性呼吸窘迫综合征(ARDS) 血红素氧合酶-1(HO-1) 核转录因子相关因子2(Nrf2-ARE)
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Synthesis,Crystal Structure and Fungicidal Activity of(E)-2-[(4-tert-Butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol 被引量:2
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作者 胡艾希 曹高 +2 位作者 马颍绮 张建宇 欧晓明 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第10期1235-1239,共5页
The title compound (E)-2-[(4-tert-butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol was synthesized by the reaction of 5-(4-methoxybenzyl)-4-tert- butylthiazol-2-amine with salicylaldehyde, and its crys... The title compound (E)-2-[(4-tert-butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol was synthesized by the reaction of 5-(4-methoxybenzyl)-4-tert- butylthiazol-2-amine with salicylaldehyde, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 5.9362(8), b = 11.5070(15), c = 29.460(4)A, β= 97.326(3)°, V = 1995.9(5) A^3, Z = 4, F(000) = 808, C22H24N2O2S, Mr= 380.49, De= 1.266 g/cm^3, S = 1.031,μ = 0.181 mm^-1, the final R = 0.0474 and wR = 0.1441 for 4327 observed reflections (I 〉 2σ(I)). Intramolecular O-H…N hydrogen bond is observed in the crystal. The preliminary bioassay showed that the title compound exhibits 95% inhibition rate against Rhizoctonia solani at the test concentration of 500 mg/L. 展开更多
关键词 crystal structure SYNTHESIS fungicidal activity (E)-2- [(4-tert-butyl-5-(4-methoxybenzyl)thiazol-2-ylimino)methyl]phenol
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Synthesis and Crystal Structure of 4-(4,6-dimethoxyl -pyrimidin-2-yl)-3-thiourea Carboxylic Acid Methyl Ester 被引量:1
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作者 HUANG Jie SONG Ji-Rong REN Ying-Hui XU Kang-Zhen MA Hai-Xia 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第2期168-172,共5页
The title compound 4-(4,6-dimethoxylpyrimidin-2-yl)-3-thiourea carboxylic acid methyl ester was synthesized by the reaction of 2-amino-4,6-dimethoxyl pyrimidine, potassium thiocyanate and methyl chloroformate in eth... The title compound 4-(4,6-dimethoxylpyrimidin-2-yl)-3-thiourea carboxylic acid methyl ester was synthesized by the reaction of 2-amino-4,6-dimethoxyl pyrimidine, potassium thiocyanate and methyl chloroformate in ethyl acetate. Single crystals suitable for X-ray measurement were obtained by recrystallization with the solvent of dimethyl formamide at the room temperature. The structure was characterized by elemental analysis and IR and determined by X-ray diffraction analysis' Crystallographic data: C9H12N4O4S, Mr = 272.29, monoclinic, space group C2/m with a = 1.6672(3), b = 0.66383(12), c = 1.1617(2) nm, β = 109.275(2)°, V = 1.2136(4) nm^3, Dc = 1.490 g/cm^3,μ = 0.281 mm^-1, F(000) = 568, Z = 4, R1 = 0.0341and wR2 = 0.1042. 展开更多
关键词 4-(4 6-dimethoxylpyrimidin-2-yl)-3-thiourea carboxylic acid methyl ester synthesis X-ray diffraction
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Synthesis and Crystal Structure of (Z)-Methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)methyl]phenyl}acrylate 被引量:1
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作者 ZHOU Zhong-Zhen YOU Wen-Wei ZHAO Pei-Liang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第10期1574-1578,共5页
The title compound,(Z)-methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)-methyl]phenyl}acrylate,was synthesized and determined by X-ray single-crystal diffraction.The crystal belongs to the triclinic system,spac... The title compound,(Z)-methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)-methyl]phenyl}acrylate,was synthesized and determined by X-ray single-crystal diffraction.The crystal belongs to the triclinic system,space group P1 with a=8.0157(8),b=12.5748(13),c=13.3768(14)Å,α=64.770(2),β=75.720(2),γ=89.784(2)°,μ=0.085 mm^(-1),Mr=442.49,V=1174.1(2)Å3,Z=2,Dc=1.252 g/cm^(3),F(000)=468,T=294(2)K,R=0.0603 and wR=0.1498 for 2644 observed reflections with I〉2σ(I).X-ray diffraction analysis reveals that the single crystal contains strong non-classical hydrogen bonds.The preliminary bioassay showed that the title compound exhibits inhibitory activity against the Pseudoperoniospora cubensis and Rhizoctonia solani at the test concentration of 200 mg/L. 展开更多
关键词 synthesis crystal structure (Z)-methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)methyl]phenyl}acrylate
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Synthesis, Structure and Quantum Mechanical Calculations of Methyl 2-(5-((Quinolin-8-yloxy)-methyl)-1,3,4-oxadiazol-2-ylthio)-acetate
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作者 AAMER SAEED FOUZIA PERVEEN +2 位作者 NAEEM ABBAS SIDRA JAMAL ULRICH FL?RKE 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第6期858-870,共13页
The title compound was synthesized by the base catalyzed reaction of 5-((quinolin- 8-yloxy)methyl)-1,3,4-oxadiazole-2(3H)-thione with methyl chloroacetate. The structure was supported by the spectroscopic data a... The title compound was synthesized by the base catalyzed reaction of 5-((quinolin- 8-yloxy)methyl)-1,3,4-oxadiazole-2(3H)-thione with methyl chloroacetate. The structure was supported by the spectroscopic data and unambiguously confirmed by single-crystal X-ray diffraction studies. It crystallizes from a methanol solution in the triclinic space group Pi with unit cell dimensions a = 7.4509(9), b = 10.2389(12), c = 12.2299(15)A, a = 74.771(2), β = 77.956(2), 7 = 69.263(2)°, V = 834.98(17) A3 and Z = 2. In order to gain some valuable insights into the molecular structure, the quantum mechanical calculations were performed using both HF and time-dependent density functional theory at the B3LYP/6-31G(d,p) level. The molecular geometry from X-ray determination of the title compound in the ground state has been compared using the Hartree-Fock (HF) and density functional theory (DFT) with the 6-31G(d) basis set. The calculated results show that the DFT and HF can well reproduce the structure of the title compound. The energetic behavior of the title compound was examined using the B3LYP method with the 6-31G(d) basis set. The harmonic vibrational frequencies calculated have been compared with the experimental FTIR and FT-Raman spectra. The restricted Hartree-Fock and density functional theory-based nuclear magnetic resonance (NMR) calculation procedure was also performed, and it was used for assigning the 13C and 1H NMR chemical shifts of the title compound. Moreover, molecular electrostatic potential and thermodynamic parameters of the title compound were investigated by theoretical calculations. 展开更多
关键词 methyl 2-(5-((quinolin-8-yloxy)methyl-1 3 4-oxadiazol-2-ylthio)acetate CRYSTALSTRUCTURE CONFORMER quantum chemical calculations vibrational studies
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Stereoselective Synthesis of (+)-△~5-Dehydrosugiyl Methyl Ether
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作者 An Pai LI Xiao Shui PENG +1 位作者 Yong Hong GAN Xin Fu PAN 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第2期111-112,共2页
A stereoselective synthetic route to △~5-dehydrosugiyl methyl ether was developed from (S)-(-)-α-cyclocitral, DDQ as a better oxidant for enone was used.
关键词 SYNTHESIS DITERPENOIDS geranic (+)-△~5-dehydrosugiyl methyl ether.
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Relationship between the berrant hypermethylation profile of 14-3-3 sigma and its reduced transcription levels in Chinese women sporadic breast carcinogenesis
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作者 Zuojun Wang Jing Feng +5 位作者 Jun Lu Yuping Wang Fei Xie Youli Zhou Jicai Zhang Wenbin Li 《The Chinese-German Journal of Clinical Oncology》 CAS 2007年第5期479-483,共5页
Objective: To study the relationship between 14-3-3 sigma gene promoter hypermethylation and its transcrip-tion levels in sporadic breast carcinogenesis. Methods: Hypermethylation of 14-3-3 sigma gene was detected by ... Objective: To study the relationship between 14-3-3 sigma gene promoter hypermethylation and its transcrip-tion levels in sporadic breast carcinogenesis. Methods: Hypermethylation of 14-3-3 sigma gene was detected by sensitive MSP assay in carcinous, non-cancerious and normal tissue, and its mRNA was also detected by real-time PCR based on SYBR Green 1. Results: The hypermethylation frequencies of 14-3-3 sigma were 90% in 68 cases of sporadic breast cancer patients. Hypermethylation was presented in portions (2/13,18%) of hyperplastic samples, and no hypermethylation was presented in normal tissue. The hypermethylation change of 14-3-3 sigma gene was markedly related with various types, grades and lymph node metastases (P < 0.05), and no significant differences in methylation frequencies were seen between premenopause and postmenopause (P > 0.05). The hypermethylation of 14-3-3 sigma showed reverse relationship with its mRNA transcription (P < 0.05). Only lymph node metastases was strongly associated with poor outcome (P = 0.02). Whether 14-3-3 sigma promoter methylation or not did not affect the 5-year survival rate of sporadic breast cancer (P > 0.05). Conclu-sion: Epigenetics alterations of the 14-3-3 sigma can contribute to reducing or losing the expression of 14-3-3 sigma protein, which plays an important role in the development of sporadic breast carcinomas including various types, grades and lymph node metastases. 展开更多
关键词 sporadic breast cancer DNA methylation CARCINOGENESIS 14-3-3 sigma
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HELIX SENSE-SELECTIVE COPOLYMERIZATION OF TRIPHENYLMETHYL METHACRYLATE WITH CHIRAL ANIONIC INITIATORS
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作者 任长玉 陈传福 习复 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1994年第4期379-384,共6页
Optically active copolymers of pairs of three monomers, triphenyl (methyl methacrylate)and one or two pyridyl substituted methyl methacrylate homologues, were obtained by helix-sense-selective copolymerization using c... Optically active copolymers of pairs of three monomers, triphenyl (methyl methacrylate)and one or two pyridyl substituted methyl methacrylate homologues, were obtained by helix-sense-selective copolymerization using complexes of organolithium with chiral ligand as anionicinitiators in toluene at low temperature. The copolymers obtained with (-)-sparteine (Sp) and(S,S)-(+)-and (R, R)-(-)-2, 3-dimethoxy-1, 4-bis (dimethylamino) butanes((+)-and (-)-DDB) complexes of organolithium showed low optical activity, but PMP complex with N, N-diphenylethyleneamine monolithium amide (PMP-DPEDA-Li) was effective in synthesizingcopolymers of high optical rotation ([α]_D^(25) about+320~1370°)which were comparable to thoseof relative homopolymers with one-handed helical structure. 展开更多
关键词 Phenyl [bis (2-pyridyl) methyl methacrylate (s)-(+)-1-(2pyrrolidinyl-methyl) pyrrolidine (PMP) Anionic asymmetric copolymerization Optically active copolymer
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Synthesis and Crystal Structure of 2-[(4-Methoxy- 6-methylthio-2-pyrimidinyl)aminocarbonyl- aminosulfonyl] Benzoic Acid Methyl Ester
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作者 黄明智 王晓光 +2 位作者 毛春晖 黄路 宋海斌 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第7期743-746,共4页
The title compound 2-[(4-methoxy-6-methylthio-2-pyrimidinyl)aminocarbonyl- aminosulfonyl]benzoic acid methyl ester (C15H16N4O6S2, Mr = 412.44) was obtained by the reaction of (4-methoxy-6-methylthio-2-pyrimidinyl)amin... The title compound 2-[(4-methoxy-6-methylthio-2-pyrimidinyl)aminocarbonyl- aminosulfonyl]benzoic acid methyl ester (C15H16N4O6S2, Mr = 412.44) was obtained by the reaction of (4-methoxy-6-methylthio-2-pyrimidinyl)amine with 2-methoxylcarbonylbenzene-sulfonylisocya- nate. The crystal is of monoclinic, space group P21/c with a =11.169(3), b = 9.508(3), c = 17.690(5) ? b = 91.593(5), Z = 4, V = 1877.9(10) 3, Dc = 1.459 g/cm3, F(000) = 856, m(MoKa) = 0.324 mm-1, R = 0.0690 and wR = 0.1368 for 3301 observed reflections (I > 2s(I)). The N(1)H…N(3) and N(2)H…O(4) hydrogen bonds can be observed. In the molecule the phenyl plane(I), pyrimi- din-2-yl-urea bridge plane(Ⅱ) and ester plane(Ⅲ) form three conjugated systems. 展开更多
关键词 crystal structure sulfonylurea herbicide 2-[(4-methoxy-6-methylthio-2- pyrimidinyl)aminocarbonylaminosulfonyl]benzoic acid methyl ester SYNTHESIS
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Synthesis and Crystal Structure of Methyl 2-(Diphenylamino)-4-phenyl-1,3-thiazole-5-carboxylate
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作者 Ali Souldozi Seyed Hamid Reza Shojaei +2 位作者 Ali Ramazani Katarzyna lepokura Tadeusz Lis 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第1期82-88,共7页
The title compound, methyl 2-(diphenylamino)-4-phenyl-1,3-thiazole-5-carboxylate, was synthesized and studied by single-crystal X-ray diffraction method. The structure of the product was confirmed by IR, 1H- and 13C... The title compound, methyl 2-(diphenylamino)-4-phenyl-1,3-thiazole-5-carboxylate, was synthesized and studied by single-crystal X-ray diffraction method. The structure of the product was confirmed by IR, 1H- and 13C-NMR spectroscopy and elemental analysis. These experimental studies were supported by quantum mechanical calculations. The structure was solved in monoclinic, space group P21/c with a = 9.573(3), b = 19.533(7), c = 9.876(3), β = 92.35(4)°, V = 1845.2(10)3, T = 85(2) K, Z = 4, R = 0.040 and wR = 0.089 for 6424 observed reflections with I2σ(I). 展开更多
关键词 single-crystal X-ray structure multi-component reaction methyl 2-(diphenylamino)-4-phenyl-1 3-thiazole-5-carboxylate benzoyl isothiocyanate DIPHENYLAMINE dimethyl acetylenedicarboxylate
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Synthesis and Crystal Structure of Methyl 3-(5-Bromo-1-ethyl-1H-indole-3-carbonyl)aminopropionate
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作者 李恺平 郑乐 +1 位作者 曾向潮 胡芳 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第7期1044-1048,共5页
Methyl 3-(5-bromo-l-ethyl-lH-indole-3-carbonyl)aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6... Methyl 3-(5-bromo-l-ethyl-lH-indole-3-carbonyl)aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6% yield. Its crystal structure was gotten and determined by X-ray diffraction method. The crystal is of monoclinic, space group P2/c with a = 11.7927(8), b = 14.9342(8), c = 9.0060(5) A, β = 101.558(6)°, V = 1553.93(16) A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ(MoKa) = 2.656 mm-1, Mr = 353.22 and F(000) = 720. The structure was refined to R = 0.0401 and wR = 0.0825 for 1704 observed reflections with I 〉 2σ(I). In the crystal structure, intermolecular N(2)-H(2)...O(1) hydrogen bond and weak intermolecular bonds (C(1)-H(1)...O(1) and C(10)-H(10B)-O(2)) are formed, and π-π stacking also exists. 展开更多
关键词 methyl 3-(5-bromo-1-ethyl-lH-indole-3-carbonyl)aminopropionate INDOLE synthesis crystal structure
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Syntheses and Crystal Structures of Methyl 2-(4,5-Dibromo-1-methylpyrrole-2-carbonylamino)-3-phenylpropanoate and 4,5-Dibromo-1-methyl-2- trichloroacetylpyrrole
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作者 ZENG Xiang-Chao GU Jian XU Shi-Hai LIU Po-Run 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第2期153-158,共6页
4,5-Dibromo-1-methyl-2-trichloroacetylpyrrole Ⅰ, prepared by the reaction of 1-methyl-2-trichloroacetylpyrrole with Br2 in 98.6 % yield, was condensed with methyl L-2-amino-3- phenylpropanoate to afford methyl 2-(4,... 4,5-Dibromo-1-methyl-2-trichloroacetylpyrrole Ⅰ, prepared by the reaction of 1-methyl-2-trichloroacetylpyrrole with Br2 in 98.6 % yield, was condensed with methyl L-2-amino-3- phenylpropanoate to afford methyl 2-(4,5-dibromo-1-methylpyrrole-2-carboxmido)-3-phenylpropanoate Ⅱ in 90.8% yield. Crystal data for Ⅰ: monoclinic system, space group P21/c with a = 8.595(3), b = 10.900(4), c = 12.321(5) ,A°,β = 92.292(7)°, V = 1153.4(8)A°^3, Dc = 2.213 g/cm^3, F(000) = 728, CTH4Br2Cl3NO, Mr = 384.28, λ = 0.71073 A°, μ(MoKa) = 7.688 mm^-1, Z = 4, R = 0.0338 and wR2 = 0.0840 for 1963 observed reflections with I 〉 2a(I). Crystal data for Ⅱ: monoclinic system, space group P21 with a = 4.886(2), b = 15.921(8), c = 11.635(6) A°,β = 101.803(9)°, V = 885.9(7) A°^3, Dc = 1.665 g/cm^3, F(000) = 440, C16H16Br2N2O3, Mr = 444.13, λ = 0.71073 A°, μ(MoKa) = 4.590 mm^-1, Z = 2, R = 0.0335 and wR2 = 0.0837 for 3191 observed reflections with I 〉 2σ(I). The crystal structure reveals that compound Ⅱ forms the one-dimensional chain structure via the intermolecular hydrogen bonds of N(2)-H…O(1). 展开更多
关键词 methyl 2-(4 5-dibromo-1-methylpyrrole-2-carbonylamino)-3-phenylpropanoate synthesis crystal structure 4 5-dibromo-1-methyl-2-trichloroacetylpyrrole
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Systematic pharmacology analysis of Sodium 8-(((carboxymethyl)amino)methyl)-4',7-bishydroxy-isoflavone-3'-sulfonate
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作者 Ze-Ping Luo Li-Wei Pan +1 位作者 Hai-Lin Chen Jun-Yu Lu 《Drug Combination Therapy》 2019年第4期186-198,共13页
The purpose of this study is to use the newly synthesized molecule Sodium 8-(((carboxymethyl)amino)methyl)-4',7-bishydroxy-isoflavone-3'-sulfonate(M)as a research object,the pharmacological mechanism of the mo... The purpose of this study is to use the newly synthesized molecule Sodium 8-(((carboxymethyl)amino)methyl)-4',7-bishydroxy-isoflavone-3'-sulfonate(M)as a research object,the pharmacological mechanism of the molecule was analyzed by using a series of Systematic pharmacology methods.The results show that the M molecule has a higher drug-like DL value of 0.59 and better molecular property parameters,namely Hdon=4,Hacc=10 and AlogP=0.94;A total of 11 M molecules related targets,namely F2,ESR1,AR,F10,CA2,DPP4,CCNA2,PRSS1,CDK2,GSK3B and PTPN1;A total of 140 diseases are associated with M molecule targets,and these diseases are mainly related to cancer and cardiovascular diseases;A total of 52 pathways involve the pharmacological mechanisms of M molecules,which are mainly related to cancer and other related diseases;GO-enriched analysis showed that these targets are closely related to the regulation of peptidase activity and biological processes such as blood coagulation and hemostasis.This article clearly demonstrated the pharmacological mechanism of M molecule,which provides references for exploring the pharmacological mechanism of new compounds. 展开更多
关键词 Sodium 8-(((carboxymethyl)amino)methyl)-4' 7-bishydroxy-isoflavone-3'-sulfonate Systematic PHARMACOLOGY analysis
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Synthesis, Characterization and Luminescence of Lanthanide Chloride Complexes with N,N,N',N'-Tetra[(2-benzimidazolyl) methyl]-1,2-Ethanediamine
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作者 Ming Jie ZHANG Ling HUANG +6 位作者 Xiu Fang SHI De Qing GAO Song Lin LI Gui Mei CAI Yan Yi HUANG Guang Qing YAO Jing LI 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第7期651-654,共4页
N,N,N',N'-tetra[(2-benzimidazolyl)methyl]-1,2-ethanediamine (EDTB) lanthanide chloride complexes were prepared (Ln3+=Eu3+, Tb3+ or Gd3+). The results of single crystal X-ray structural analysis show that [(ED... N,N,N',N'-tetra[(2-benzimidazolyl)methyl]-1,2-ethanediamine (EDTB) lanthanide chloride complexes were prepared (Ln3+=Eu3+, Tb3+ or Gd3+). The results of single crystal X-ray structural analysis show that [(EDTB)GdCl2]Cl(C2H5OH)(H2O)2 crystal is in space group P21 / c with a=8.848(2) ?, b=26.313(5) ?, c=18.929(4) ?, β=97.82(3)o, V=4366(2) ?3, Z=4. The luminescent properties of the terbium and europium complexes have been studied. 展开更多
关键词 N N N( N(-Tetra[(2-benzimidazolyl)methyl]-1 2-ethanediamine lanthanide complexes crystal structure luminescent properties.
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Synthesis of Intermediate N-Chloroformyl-N-[4-(trifluoromethoxy)phenyl]Methyl Carbamate of Indoxacarb
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作者 Zhang Zhenming Kong Xianbin +2 位作者 Wang Gang Wang Xiaohui Liu Minjin 《Plant Diseases and Pests》 CAS 2020年第1期36-40,共5页
[Objective]The paper was to study a synthetic method suitable for industrial production of intermediate N-Chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl carbamate of indoxacarb.[Method]Using 4-trifluoromethoxy anil... [Objective]The paper was to study a synthetic method suitable for industrial production of intermediate N-Chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl carbamate of indoxacarb.[Method]Using 4-trifluoromethoxy aniline as the starting material,[4-(trifluoromethoxy)phenyl]carbamate was synthesized by homogeneous formylation method without acid-binding agent.Subsequently,it was reacted with sodium methoxide/potassium methoxide by reactive distillation to obtain[4-(trifluoromethoxy)phenyl]carbamate ammonium sodium/potassium,then directly reacted with triphosgene to obtain crude products of N-carbonochloridoyl-N-[4-(trifluoromethoxy)phenyl]carbamate;finally,competing product was obtained by recrystallization.[Result]The intermediate N-chloroformyl-N-[4-(trifluoromethoxy)phenyl]carbamate was synthesized by the method.The content of products was higher than 98%.The yield of product reached above 96%(calculated by 4-trifluoromethoxy aniline).[Conclusion]The method used for the synthesis of intermediate N-chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl carbamate was simple,with less three wastes,higher safety and lower cost. 展开更多
关键词 INDOXACARB INTERMEDIATE N-chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl CARBAMATE Synthesis Sodium/potassium ammonium salt FORMYLATION Recrystallization
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Synthesis and Crystal Structure of N-((6-chloropyridin-3-yl)methyl)-6-ethoxy-N-ethyl-3-nitropyridin-2-amine
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作者 吴道新 刘民华 +6 位作者 柳爱平 黄明智 胡志彬 任叶果 刘兴平 唐明 左文清 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第5期621-624,共4页
The title compound N-((6-chloropyridin-3-yl)methyl)-6-ethoxy-N-ethyl-3-nitropyri-din-2-amine(4) was synthesized by reacting the mixture of 6-chloro-2-ethoxy-3-nitropyridine(1) and 2-chloro-6-ethoxy-3-nitropyri... The title compound N-((6-chloropyridin-3-yl)methyl)-6-ethoxy-N-ethyl-3-nitropyri-din-2-amine(4) was synthesized by reacting the mixture of 6-chloro-2-ethoxy-3-nitropyridine(1) and 2-chloro-6-ethoxy-3-nitropyridine(2) with 3,and its structure was determined by X-ray single-crystal diffraction.The crystal belongs to the monoclinic system,space group P21/n with a = 7.3441(2),b = 9.9041(3),c = 11.7368(3) ,α = 101.410(2),β = 102.1340(10),γ = 99.594(2)o,μ = 0.260 mm^-1,Mr = 336.78,V = 798.58(4)(A°)^3,Z = 2,Dc = 1.401g/cm^3,F(000) = 352,T = 296(2) K,R = 0.0210 and wR = 0.1053. 展开更多
关键词 synthesis crystal structure N-((6-chloropyridin-3-yl)methyl-6-ethoxy-N-ethyl-3-nitropyridin-2-amine insecticidal and fungicidal activities
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Synthesis and Crystal Structure of 1,4-Dimethyl-2,5-di{[2’-(3-pyridylmethylamino-formyl)phenoxyl]methyl}benzene Perchlorate
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作者 TANG Kuan-Zhen TANG Yu +2 位作者 LI Ya-Fei LIU Wei-Sheng TAN Min-Yu 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第4期451-454,共4页
The title compound, 1,4-dimethyl-2,5-di { [2′-(3-pyridylmethylaminoformyl)phenoxyl]- methyl}benzene perchlorate (C36H36Cl2N4O12, Mr = 787.59), has been synthesized and structurally determined by single-crystal X-... The title compound, 1,4-dimethyl-2,5-di { [2′-(3-pyridylmethylaminoformyl)phenoxyl]- methyl}benzene perchlorate (C36H36Cl2N4O12, Mr = 787.59), has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 14.366(4), b = 15.159(4), c = 16.443(5)A, V = 3580.9(17)/A3 Z = 4, De = 1.461 g/cm^3, /t = 0.253 mm^-1, F(000) = 1640, R = 0.0618 and wR = 0.1525 for 1615 observed reflections (I 〉 2σ(I)). In the structure of the title compound, a two-dimensional supramolecular layer is formed via intermolecular hydrogen bonding interactions. 展开更多
关键词 2 5-dimethyl-l 4-di{ [2′-(3-pyridylmethylaminoformyl)phenoxyl]methyl)benzene synthesis spectral characterization crystal structure
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Regulation of P1-450 Gene Expression by Dimethylbenzanthracene in Human Lung Tumor Cells in Culture
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作者 费云标 Kirstin L.Brown Debajit K.Biswas 《Developmental and Reproductive Biology》 1992年第1期7-15,T001-T003,共12页
Polycyclic aromatic hydrocarbons(PAHs),dimethyl beazanthracene(DMBA)and benzo-(a)-pyrene(BaP),stimulate the expression of the P1-450 gene in human lung tumor cells(ChaGo)in culture.A concentration-and time-dependent i... Polycyclic aromatic hydrocarbons(PAHs),dimethyl beazanthracene(DMBA)and benzo-(a)-pyrene(BaP),stimulate the expression of the P1-450 gene in human lung tumor cells(ChaGo)in culture.A concentration-and time-dependent increase in the level of P1-450 specific mRNA sequences hasbeen observed in ChaGo cells treated with sublethal concentrations of DMBA.Results presentedsuggest that the parent compound causes the induction of P1-450 gene expression.The methylationpattern of the internal“-C-” residues of the “-CCGG-” sequence has been studied in a stretch ofabout 8000 base pairs(bp)of DNA sequence in and around the P1-450 gene in the control andDMBA-treated ChaGo cells.A comparative Southern blot analysis of the Msp Ⅰ/Hpa Ⅱ digestedDNA of the control and DMBA-treated ChaGo cells followed by hybridization with ^(32)P-labelledregion-specific probes,revealed that i)the internal “-C-” residues of the “-CCGG-” sequences ofdifferent regions of P1-450 gene were methylated to different degrees;ii)DMBA treatment of thecells induced hypomethylation of only the 5' end “-CCGG-” sequences of the gene;and iii)themethylation patterns of “-CCGG-” sequences of most of the coding region and of the 3' end regionof P1-450 gene were not affected by such DMBA treatment. 展开更多
关键词 P1-450 gene Dimethyl-benzanthracene(DMBA) methylATION HYPOmethylATION
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LC-MS^n测定2-[[(2′-氰基联苯基)-4-基]甲基]氨基-3-硝基苯甲酸乙酯中的不纯物
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作者 姚骏骅 《分析测试学报》 CAS CSCD 北大核心 2007年第z1期125-126,共2页
The impurities in ethyl-2-[[2′-cyanobiphenyl-4-yl] methyl] amino]-3-nitrobenzoate,an intermediate for synthesis of candesartan cilexiti,were detected by LC-MSn. The structural assignment of these impurities was carri... The impurities in ethyl-2-[[2′-cyanobiphenyl-4-yl] methyl] amino]-3-nitrobenzoate,an intermediate for synthesis of candesartan cilexiti,were detected by LC-MSn. The structural assignment of these impurities was carried out by LC-MSn using electrospray ionization source and an ion trap mass analyzer. The formation of the impurities was discussed. Also the fragmentation pathways of these compounds were studied. 展开更多
关键词 LC-MSn Ethyl-2-[[2′-cyanobiphenyl-4-yl] methyl] amino]-3-nitrobenzoate IMPURITIES Fragmentation pathways
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2-羟基-4-(5,6-二硝基-1H-苯并[2,3-d]咪唑-2-基)苯甲酸甲酯的合成探索 被引量:3
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作者 张青龙 金宁人 +2 位作者 杨健 张清义 张建庭 《化工进展》 EI CAS CSCD 北大核心 2014年第3期744-748,757,共6页
以4,5-二硝基邻苯二胺和2-羟基对苯二甲酸单甲酯为起始原料,设计并成功采用一锅法合成出2-羟基-4-(5,6-二硝基-1H-苯并[2,3-d]咪唑-2-基)苯甲酸甲酯(MHDIB)。以50 mL二乙二醇二甲醚为溶剂,1.5 g的2-羟基对苯二甲酸单甲酯和2.5 g SOCl2... 以4,5-二硝基邻苯二胺和2-羟基对苯二甲酸单甲酯为起始原料,设计并成功采用一锅法合成出2-羟基-4-(5,6-二硝基-1H-苯并[2,3-d]咪唑-2-基)苯甲酸甲酯(MHDIB)。以50 mL二乙二醇二甲醚为溶剂,1.5 g的2-羟基对苯二甲酸单甲酯和2.5 g SOCl2在80℃反应2 h制2-羟基-4-氯羰基苯甲酸甲酯。室温下快速向反应体系中加入1.56 g 4,5-二硝基邻苯二胺,并于85℃反应1 h后加入3.52 g多聚磷酸,回流反应1 h后水析出粗产品,经乙醇重结晶得到纯度为93.67%的黄色针状产物,产率为17.82%。产物经IR、MS、1H NMR的准确定性和表征,作为AB型新单体的前体可应用于羟基改性PBI纤维即聚2-羟基-1,4-亚苯基-2,6-苯并[2,3-d:5',6'-d']二咪唑(H-PBI)的创新研究。 展开更多
关键词 2-羟基-4-(5 6-二硝基-1H-苯并2 3-d咪唑-2-基)苯甲酸甲酯 4 5-二硝基邻苯二胺 羟基改性PBI纤维 聚合 合成 纯化 methyl 2-hydrox yl-4-(5 6-dinitro-1H-benzo[2 3-d]imidazole-2-yl)benzoate(MHDIB)
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