期刊文献+
共找到615篇文章
< 1 2 31 >
每页显示 20 50 100
Assessment of electrostatic discharge sensitivity of nitrogen-rich heterocyclic energetic compounds and their salts as high energy-density dangerous compounds:A study of structural variables
1
作者 Mohammad Hossein Keshavarz Sedigheh Heydari Bani +1 位作者 Reza Bakhtiari Seyyed Hesamodin Hosseini 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第9期15-22,共8页
Nitrogen-rich heterocyclic energetic compounds(NRHECs)and their salts have witnessed widespread synthesis in recent years.The substantial energy-density content within these compounds can lead to potentially dangerous... Nitrogen-rich heterocyclic energetic compounds(NRHECs)and their salts have witnessed widespread synthesis in recent years.The substantial energy-density content within these compounds can lead to potentially dangerous explosive reactions when subjected to external stimuli such as electrical discharge.Therefore,developing a reliable model for predicting their electrostatic discharge sensitivity(ESD)becomes imperative.This study proposes a novel and straightforward model based on the presence of specific groups(-NH_(2) or-NH-,-N=N^(+)-O^(-)and-NNO_(2),-ONO_(2) or-NO_(2))under certain conditions to assess the ESD of NRHECs and their salts,employing interpretable structural parameters.Utilizing a comprehensive dataset comprising 54 ESD measurements of NRHECs and their salts,divided into 49/5 training/test sets,the model achieves promising results.The Root Mean Square Error(RMSE),Mean Absolute Error(MAE),and Maximum Error for the training set are reported as 0.16 J,0.12 J,and 0.5 J,respectively.Notably,the ratios RMSE(training)/RMSE(test),MAE(training)/MAE(test),and Max Error(training)/Max Error(test)are all greater than 1.0,indicating the robust predictive capabilities of the model.The presented model demonstrates its efficacy in providing a reliable assessment of ESD for the targeted NRHECs and their salts,without the need for intricate computer codes or expert involvement. 展开更多
关键词 Electrostatic discharge sensitivity heterocyclic energetic compounds containing azole compound Interpretable structural parameter Safety
下载PDF
A new heterocyclic compound from Cyathula officinalis Kuan 被引量:8
2
作者 Liu, Jie Xu, Jing +3 位作者 Zhao, Xiao Jun Gao, Wen Yuan Zhang, Shu Zhong Guo, Yuan Qiang 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第1期70-72,共3页
A new heterocyclic compound,named 5,5 -diisobutoxy-2,2 -bifuran(1),and four known compounds(2-5) were isolated from the roots of Cyathula officinalis Kuan.Their structures were elucidated by spectroscopic methods.Amon... A new heterocyclic compound,named 5,5 -diisobutoxy-2,2 -bifuran(1),and four known compounds(2-5) were isolated from the roots of Cyathula officinalis Kuan.Their structures were elucidated by spectroscopic methods.Among these compounds,5,5 - dibutoxy-2,2 -bifuran(2) was isolated for the first time from this plant. 展开更多
关键词 Cyathula officinalis Kuan 5 5 -Diisobutoxy-2 2 -bifuran heterocyclic compound
下载PDF
A Novel Eleven-membered Heterocyclic Compound from Algae Sargassum Vachell 被引量:1
3
作者 Shi Hat XU Ying Zhou CEN +1 位作者 Yao Lan LI Shao Yu XU(Department of chemistry. Jinan University. Guangzhou 510632) 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第5期401-402,共2页
A novel eleven-membered heterocyclic compound with high nitrogen has been isolated from the marine alga Sargassum vachell collected from the South China Sea. Its structure has been established by verity of spectroscop... A novel eleven-membered heterocyclic compound with high nitrogen has been isolated from the marine alga Sargassum vachell collected from the South China Sea. Its structure has been established by verity of spectroscopic techniques such as IR. EIMS. ID NMR. H-1-(HCOSY)-H-1. HMQC, HMBC. 展开更多
关键词 heterocyclic compound Sargassum vachell structure elucidation
下载PDF
Ab Initio Study of the Mechanism of Forming a Spiro-Si-heterocyclic Ring Compound Involving Ge from Cl_2Ge=Si:and Formaldehyde 被引量:2
4
作者 明静静 韩军锋 卢秀慧 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第9期1267-1274,共8页
The X2Ge=Si: (X = H, Me, F, reaction is a new area for the study of silylene between singlet CI2Ge=Si: and formaldehyde CI, Br, Ph, At...) is a new species. Its cycloaddition chemistry. The mechanism of cycloaddit... The X2Ge=Si: (X = H, Me, F, reaction is a new area for the study of silylene between singlet CI2Ge=Si: and formaldehyde CI, Br, Ph, At...) is a new species. Its cycloaddition chemistry. The mechanism of cycloaddition reaction has been investigated with CCSD(T)//MP2/6-31G* method. From the potential energy profile, it can be predicted that the reaction has two competitive dominant reaction pathways. The reaction rule presented is that the two reactants firstly form a four-membered Ge-heterocyclic ring silylene through the [2+2] cycloaddition reaction. Owing to the 3p unoccupied orbital of Si: atom in the four-membered Ge-heterocyclic ring silylene and the π orbital of formaldehyde forming a π-p donor-acceptor bond, the four-membered Ge-heterocyclic ring silylene further combines with formaldehyde to form an intermediate. Because the Si: atom in intermediate shows sp3 hybridization after transition state, the intermediate isomerizes to a spiro-Si-heterocyclic ring compound involving Ge via a transition state. Simultaneously, the ring strain of the four-membered Ge-heterocyclic ring silylene makes it isomerize to a twisted four-membered ring product. The research result indicates the laws of cycloaddition reaction between X2Ge=Si: (X = H, Me, F, C1, Br, Ph, Ar...) and the asymmetric g-bonded compounds, which are significant for the synthesis of small-ring and spiro-Si-heterocyclic ring compound involving Ge The study extends the research area and enriches the research content of silvlene chemistrv. 展开更多
关键词 CI2Ge=Si: four-membered Ge-heterocyclic ring silylene spiro-Si-heterocyclic ring compound potential energy profile
下载PDF
α-Oxo Ketene Dithioacetals Chemistry-A Facile Route to the Synthesis of Fused Heterocyclic Compounds 被引量:1
5
作者 Mei Xin ZHAO Qun LIU +1 位作者 Yu Lan HU De Long LI (Department of Chemistry. Northeast Normal University, Changchun 130024) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第4期283-284,共2页
The fused heterocyclic compounds 2 : imidazo [1.2-a] pyriding 2a-c and pyrido [ 1 .2-a] pyrimidine 2d were obtained from the reaction of α-cinnamoyl ketene dibenzylthio acetals 1 with diamine. When α-cinnamoyl -a... The fused heterocyclic compounds 2 : imidazo [1.2-a] pyriding 2a-c and pyrido [ 1 .2-a] pyrimidine 2d were obtained from the reaction of α-cinnamoyl ketene dibenzylthio acetals 1 with diamine. When α-cinnamoyl -a'-benzoyl ketene N. N-acetals 3a-b were treated by t-BuONa/t- BuOH Solution. 8- benzoyl-pyrido[1.2-a] pyrimidine 4 was produced. 展开更多
关键词 α-Cinnamoyl ketene dibenzylthio acetals. diamine. α-cinnamoyl-α'-benzoyl ketene N. N-acetals. fused heterocyclic compounds
下载PDF
Ab Initio Study of Mechanism of Forming a Si-heterocyclic Spiro-Sn-heterocyclic Ring Compound by Cycloaddition Reaction of Cl2Si=Sn: and Ethylene 被引量:1
6
作者 TAN Xiao-Jun LU Xiu-Hui 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第5期673-678,667,共7页
X2Si=Sn:(X = H, Me, F, Cl, Br, Ph, Ar…) are new species of chemistry. The cycloaddition reaction of X2Si=Sn: is a new study field of stannylene chemistry. To explore the rules of cycloaddition reaction between X2Si=S... X2Si=Sn:(X = H, Me, F, Cl, Br, Ph, Ar…) are new species of chemistry. The cycloaddition reaction of X2Si=Sn: is a new study field of stannylene chemistry. To explore the rules of cycloaddition reaction between X2Si=Sn: and the symmetric p-bonded compounds, the cycloaddition reactions of Cl2Si=Sn: and ethylene were selected as model reactions in this paper.The mechanism of cycloaddition reaction between singlet Cl2Si=Sn: and ethylene has been first investigated with the MP2/GENECP(C, H, Cl, Si in 6-311++G**;Sn in LanL2dz) method in this paper. From the potential energy profile, it could be predicted that the reaction has one dominant reaction channel. The reaction rule presented is that the 5p unoccupied orbital of Sn in Cl2Si=Sn: and the π orbital of ethylene forming a p→p donor-acceptor bond, resulting in the formation of an intermediate. Instability of the intermediate makes it isomerize to a four-membered Si-heterocyclic ring stannylene. Because the 5p unoccupied orbital of Sn atom in the four-membered Si-heterocyclic ring stannylene and the π orbital of ethylene form a p→p donor-acceptor bond, the four-membered Si-heterocyclic ring stannylene further combines with ethene to form another intermediate. Because the Sn atom in the intermediate shows sp3 hybridization after transition state, the intermediate isomerizes to a Si-heterocyclic spiro-Sn-heterocyclic ring compound. The research result indicates the laws of cycloaddition reaction between X2Si=Sn: and the symmetric π-bonded compounds. The study opens up a new research field for stannylene chemistry. 展开更多
关键词 Cl2Si=Sn: four-membered Si-heterocyclic RING stannylene spiro-Sn-heterocyclic RING compound potential energy profile
下载PDF
Ab Initio Study of the Mechanism of Forming a Spiro-Ge-heterocyclic Ring Compound Involving Si from Me_2Si=Ge: and Formaldehyde 被引量:2
7
作者 卢秀慧 王党生 +1 位作者 李涛 廉贞霞 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第4期481-487,共7页
X2Si=Ge: (X = H, Me, F, CI, Br, Ph, Ar...) is a new species. Its cycloaddition reaction is a new area for the study of germylene chemistry. The mechanism of cycloaddition reaction between singlet state Me2Si=Ge: a... X2Si=Ge: (X = H, Me, F, CI, Br, Ph, Ar...) is a new species. Its cycloaddition reaction is a new area for the study of germylene chemistry. The mechanism of cycloaddition reaction between singlet state Me2Si=Ge: and formaldehyde has been investigated with the CCSD(T)//MP2/cc-pvtz method. From the potential energy profile, it could be predicted that the reaction has one dominant reaction pathway. The reaction rule presented is that the two reactants first form a four-membered Si-heterocyclic ring germylene through the [2+2] cycloaddition reaction. Because of the 4p unoccupied orbital of Ge: atom in the four-membered Si-heterocyclic ring germylene and the π orbital of formaldehyde form a π→p donor-acceptor bond, the four-membered Si-heterocyclic ring germylene further combines with formaldehyde to form an intermediate. Because the Ge atom in the intermediate undergoes sp^3 hybridization after transition state, then the intermediate isomerizes to a spiro-Ge-heterocyclic ring compound involving Si via a transition state. The research result indicates the laws of cycloaddition reaction between HzSi=Ge: and formaldehyde. It has important reference value for the cycloaddition reaction between X2Si=Ge: (X = H, Me, F, CI, Br, Ph, Ar…) and asymmetric to-bonded compounds, which is significant for the synthesis of small-ring and spiro-Ge-heterocyclic compounds involving Si. The study extends research area and enriches the research content of germylene chemistry. 展开更多
关键词 Me2Si=Ge: four-membered Si-heterocyclic ring germylene spiro-Ge-heterocyclicring compounds potential energy profile
下载PDF
CATALYTIC LABELLING AND ~3H NMR ANALYSES OF SOME AROMATIC AND HETEROCYCLIC COMPOUNDS
8
作者 张丽明 John R. Jones 《Nuclear Science and Techniques》 SCIE CAS CSCD 1991年第3期184-189,共6页
This paper described the ~3H NMR determination of the positions and content of 24 tritium labeled aromatic and heterocyclic compounds prepared by catalytic tritiation derivatives, pyrrole, 1,2,4-triazole, thiazole, be... This paper described the ~3H NMR determination of the positions and content of 24 tritium labeled aromatic and heterocyclic compounds prepared by catalytic tritiation derivatives, pyrrole, 1,2,4-triazole, thiazole, benzothiazole, purine and derivatives, indole, indanol, piperidine and derivative, diphenylamine, N- phenylanthranilic acid, 8- OH- quinoline, naphthol, diphenylether have been tritiated by catalytic exchange method using tritiated water and platinum catalyst (from the dioxide and sodium borohydride), and the pattern of labelling has been assigned by ~3H NMR spectroscopy. The results show that this exchange process can give general labelling compounds at various time and temperatures. For 4-Br-diphenylether, Raney nickel was used instead of Pt as a catalyst. 展开更多
关键词 ~3H NMR labeled heterocyclic compoundS AROMATIC CATALYTIC labelling
下载PDF
Syntheses and Characterization of Heterocyclic Compounds of Zirconium ( Ⅳ )
9
作者 WANG Ji-tao, ZHANG Yun-wen, XIU Yu-ming, LI Jiang-sheng and GONG You-sheng (Department of Chemistry, Nankai University, Tianjin, 300071) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1992年第3期212-218,共7页
The Zr-H bond of zirconocene hydridochloride was heterolyzed at room temperature by five compounds containing nitrogen and hydroxyl group to give Cp(Q)2ZrCl(1) (Cp = cyclopentadienyl and Q = 8-quinolinoyl ) , Cp (Q-Me... The Zr-H bond of zirconocene hydridochloride was heterolyzed at room temperature by five compounds containing nitrogen and hydroxyl group to give Cp(Q)2ZrCl(1) (Cp = cyclopentadienyl and Q = 8-quinolinoyl ) , Cp (Q-Me )2ZrCl (2) , Cp(5,7-Br2Q)2ZrCl(3), Cp2(2-pyridoyl)ZrCl(4) , and Cp(2-aminoethanoyl)2ZrCl(5), which were characterized by elemental analysis, IR, and 1H NMR spectroscopy. The molecular structure of 1 was confirmed by X-ray diffraction determination. The crystal of 1 crystallized monoclinically, space group P21/n a= 0.9004(2), b=1.3961(2), c = 1. 6056(2) nm, β=99. 48(1)°? V=1. 9906 nm3, Z = 4, and Dc=1. 582 g/cm3. The coordination polyhedron around the Zr atom can be described as a distorted octahedron. The Zr-N bonds of 0. 2364(3) and 0. 2377(4) nm suggest that they are coordination bonds. The two planar 8-quinolinoyl groups as bidentate ligands chelate with Zr atom, forming a dihedral angle of 108. 4(1)°? 展开更多
关键词 SYNTHESES CHARACTERIZATION heterocyclic compounds of Zirconium
下载PDF
Synthesis and π-Facial Diastereoselection of Heterocyclic Cage Compounds
10
《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期543-543,共1页
关键词 Facial Diastereoselection of heterocyclic Cage compounds Synthesis and
下载PDF
SYNTHESIS OF FUSED PHOSPHORUS HETEROCYCLIC COMPOUNDS(II)
11
作者 Hua Zheng YANG Rong Jian LU and Zhen Feng SHANG(National Key Laboratory of Elemento-Organic Chemistry, Nankai University,94 Weijin Road, Tianjin 300071) 《Chinese Chemical Letters》 SCIE CAS CSCD 1995年第10期851-852,共2页
Using cation exchange resin(D72,Amberlyst-15) as catalyst, Mannich-type reaction of 5-amino-1,2,4-triazole 1, containing guanidine substructure, provides an efficient synthesis of a new kind of bicyclic P- and N-conta... Using cation exchange resin(D72,Amberlyst-15) as catalyst, Mannich-type reaction of 5-amino-1,2,4-triazole 1, containing guanidine substructure, provides an efficient synthesis of a new kind of bicyclic P- and N-containing compounds, 6-phospha-4,5,6-trihydroimidazolo [2,3-e] 1,2,4-triazole 4. 展开更多
关键词 II SYNTHESIS OF FUSED PHOSPHORUS heterocyclic compoundS
下载PDF
SYNTHESIS OF 6,7-METHYLENEDIOXY-3-THIA-1(2H,4H)ACRIDONE AND THE RELATED THIA-ACRIDINE-PUSED HETEROCYCLIC COMPOUNDS
12
作者 Ji Rui HOU Jin Jun WANG (Department of Fine Chemistry,Jilin Chemical Industry Institute,Jilin 132022)Gui Ji JIANG Jing Shu LI (Department of Chemistry,Yanbian University,Yanji 133002) 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第7期513-514,共2页
6,7-Methylenedioxy-3-thia-1(2H,4H)acridone and the related acridine-fused quinolines and pyridines,and also their flavylium-perchlorates were synthesized.The structures of all these compounds prepared are characterize... 6,7-Methylenedioxy-3-thia-1(2H,4H)acridone and the related acridine-fused quinolines and pyridines,and also their flavylium-perchlorates were synthesized.The structures of all these compounds prepared are characterized by elemental analysis.IR and H-NMR spectra. 展开更多
关键词 ACRIDONE AND THE RELATED THIA-ACRIDINE-PUSED heterocyclic compoundS SYNTHESIS OF 6 7-METHYLENEDIOXY-3-THIA-1
下载PDF
CHARACTERIZATION OF SOME SCHIFF BASES OF HETEROCYCLIC COMPOUNDS AND THEIR TRANSITION METAL COMPLEXES
13
作者 Geng ZHANG Jun Ming TANG Quan Ling LOU Zan SHI Department of Chemistry,Henan Normal University,Xinxiang,453002 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第9期681-682,共2页
Some new Schiff bases were synthesized by the condensation of equimolar quantities of salicylaldehyde and 2-amino-5-phenylazo-pyridine or its derivatives in dry benzene(1):Metal complexes of the type ML_2and M'L_3... Some new Schiff bases were synthesized by the condensation of equimolar quantities of salicylaldehyde and 2-amino-5-phenylazo-pyridine or its derivatives in dry benzene(1):Metal complexes of the type ML_2and M'L_3 where M=Cu^(2+),Co^(2+),Ni^(2+),Mn^(2+)Pd^(2+),M'=Fe^(3+)and L=different newly synthesized monobasic Schiff bases were prepared in absolute ethanolic medium(2)and characterized by elementary analysis,conductance measurements,infrared spectra,electronic spectra,magnetic moments studies. 展开更多
关键词 CHARACTERIZATION OF SOME SCHIFF BASES OF heterocyclic compoundS AND THEIR TRANSITION METAL COMPLEXES
下载PDF
Electrophysiological and Inotropic Effects of Iodium-Heterocyclic Compound on lsolated Guinea Pig Papillary Muscles
14
作者 曹维 赵德化 盛宝恒 《Journal of Medical Colleges of PLA(China)》 CAS 1989年第2期120-123,共4页
The effects of iodium-heterocyclic compound(3,6-di-[dimethytamino]-dibcnzopyrodoniun formate,IHC-64)on the action potentials and contractile force of the isolatedguinca pig papillary muscles were investigatad.50 μm... The effects of iodium-heterocyclic compound(3,6-di-[dimethytamino]-dibcnzopyrodoniun formate,IHC-64)on the action potentials and contractile force of the isolatedguinca pig papillary muscles were investigatad.50 μmol/L IHC-64 only inhibited contractile forceand had no effect on APA,dv/dt max,APD<sub>5</sub>0 and APD<sub>9</sub>0 of fast action potentials in Tyrode’s so-lution.All of these parametres were depressed by further increasing concentration of IHC-64.InK-rich Tyrodc’s solution,the depressive action of IHC-64 on slow action potentials andcontractile force could be antagonized by incrcased extracellular calcium.These results suggesr thatIHC-64 inhibit not only slow calcium influx but also fast sodium influx,and it may.(?)new calci-urn channd blockcr. 展开更多
关键词 iodium-heterocyclic compound calcium channel BLOCKER PAPILLARY muscle action polential CONTRACTILE force of MYOCARDIUM
下载PDF
Bright Blue Light-emitting Diodes Based on a Novel Fluorescent Dye Containing Heterocyclic Groups 被引量:1
15
作者 XIE Zhiyuan HUANG Jingsong +2 位作者 CHEN Baijun HOU Jingying LIU Shiyong (National Lab. of Integrated Optoelectron., Jinn University, Changchun 130023, CHN ) LI Dongfeng (Dept.of Light Chem.and Text.Eng.,Jilin Institute of Technology,Changchun 130012,CHN) 《Semiconductor Photonics and Technology》 CAS 1998年第2期109-112,133,共5页
Novel molecular material, 1-benzotlliazoly-3 -phenyl --pyrazoline (BTPP) was found to function as bright blue light emitting dye in organic electroluminescent device, and its optical and electric characteristics were ... Novel molecular material, 1-benzotlliazoly-3 -phenyl --pyrazoline (BTPP) was found to function as bright blue light emitting dye in organic electroluminescent device, and its optical and electric characteristics were investigated. This heterocyclic compound exhibited good characteristics of blue photoluminescence and electroluminescence, which had the emission peak at 450 nm. The single layer light-emitting devices using BTPP as light-emitting material dispersed in poly(N- vinylcarbazole) (PVK) and double layer ones using PBD as hole block layer above the light-emitting layer were fabricated using conventional spin-casting and vaccum vapour deposition methods. The introduction of PBD has enhanced electron injection and luminance efficiency, compared with the single layer LEDs. 展开更多
关键词 heterocyclic compound Hole Block Layer Organic EL
下载PDF
Synthesis of 2-methoxy-6-oxo-1, 4, 2-diazaphosphorinane-2-oxide, A New Potential Antitumor Phosphorus Heterocycle Compound
16
作者 Xu, L Zheng, GR +1 位作者 Xia, M Cai, JC 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第8期665-666,共2页
2-methoxy-6-oxo-1, 4, 2-diazaphosphorinane-2-oxide 8, phosphorus counterpart of 2, 6-dioxopiperazine, was synthesized as antitumor agent. The new phosphorus heterocycle compound 8 is the key intermediate in the synthe... 2-methoxy-6-oxo-1, 4, 2-diazaphosphorinane-2-oxide 8, phosphorus counterpart of 2, 6-dioxopiperazine, was synthesized as antitumor agent. The new phosphorus heterocycle compound 8 is the key intermediate in the synthesis of phosphorus counterpart of bisdioxopiperazine. 展开更多
关键词 antitumor activity phosphorus heterocycle compound 2 6-dioxopiperazine
下载PDF
基于福井函数方法的芳杂环化合物亲电取代反应位点预测及图形可视化教学应用
17
作者 李琳 杨宝华 张爱华 《安徽师范大学学报(自然科学版)》 2024年第2期129-135,共7页
基于福井函数方法,利用Gaussian和Multiwfn软件预测了常见芳杂环化合物及取代芳杂环化合物的亲电取代反应位点,使之以可视化图像形式展现并应用于基础有机化学的教学实践。
关键词 Gaussian软件 Multiwfn软件 福井函数 芳杂环化合物 反应位点 图形可视化
下载PDF
5-取代-4-氨基-3-巯基-1,2,4-三唑衍生物的应用进展
18
作者 周淑晶 洛雪 +2 位作者 柳召宁 蒋雨婷 李进京 《化学试剂》 CAS 2024年第2期10-19,共10页
5-取代-4-氨基-3-巯基-1,2,4-三唑是一类重要的五元杂环化合物,由于分子中含有巯基和伯胺基两个活性基团,既可以单个基团参与反应生成N-或S-取代产物,又可以同时发生反应生成稠杂环化合物。由其衍生而来的化合物具有广泛的生物活性,在... 5-取代-4-氨基-3-巯基-1,2,4-三唑是一类重要的五元杂环化合物,由于分子中含有巯基和伯胺基两个活性基团,既可以单个基团参与反应生成N-或S-取代产物,又可以同时发生反应生成稠杂环化合物。由其衍生而来的化合物具有广泛的生物活性,在抗菌、抗肿瘤、抗结核、抗炎镇痛、酶抑制剂、荧光探针等方面都表现出优异的性能。综述了近年来5-取代-4-氨基-3-巯基-1,2,4-三唑衍生物在医学、农业及材料领域的应用,为今后进一步研究、开发此类化合物提供参考。 展开更多
关键词 5-取代-4-氨基-3-巯基-1 2 4-三唑 衍生物 席夫碱 稠杂环化合物 应用
下载PDF
可见光诱导6H-苯并[c]苯并吡喃及二氢菲啶衍生物的合成
19
作者 杨森 胡浩 陈铭 《常州大学学报(自然科学版)》 CAS 2024年第4期1-7,共7页
开发出了可见光诱导的分子内C—H芳基化反应,合成了一系列6H-苯并[c]苯并吡喃及二氢菲啶衍生物。合成得到的产物用^(1)H NMR以及^(13)C NMR进行结构表征。与传统方法相比,该方法利用清洁可再生的光能驱动化学反应,避免了高温、高压等严... 开发出了可见光诱导的分子内C—H芳基化反应,合成了一系列6H-苯并[c]苯并吡喃及二氢菲啶衍生物。合成得到的产物用^(1)H NMR以及^(13)C NMR进行结构表征。与传统方法相比,该方法利用清洁可再生的光能驱动化学反应,避免了高温、高压等严格的反应条件。此外,该方法具有原料易得、底物适用范围广泛、反应条件温和、操作简单等优点。 展开更多
关键词 可见光诱导 C—H芳基化 6H-苯并[c]苯并吡喃 二氢菲啶 杂环化合物
下载PDF
含吡唑酮和马来酰亚胺结构单元的含氮杂环化合物的合成研究
20
作者 李磊 纪凤婷 彭林 《广东化工》 CAS 2024年第12期25-27,共3页
吡唑酮环是一类具有抗菌、解热、镇痛等生物活性的重要结构母核,而且吡唑酮及其衍生物更是具有抗炎、抗癌等作用。马来酰亚胺骨架是一类广泛存在的药物、天然产物、功能材料、生物活性分子中的重要结构单元,此外马来酰亚胺骨架也是各类... 吡唑酮环是一类具有抗菌、解热、镇痛等生物活性的重要结构母核,而且吡唑酮及其衍生物更是具有抗炎、抗癌等作用。马来酰亚胺骨架是一类广泛存在的药物、天然产物、功能材料、生物活性分子中的重要结构单元,此外马来酰亚胺骨架也是各类药物分子与天然产物中的关键结构单元。本文以吡唑酮烯烃与马来酰亚胺烯烃为底物合成含有吡唑酮和马来酰亚胺结构单元的含氮杂环化合物,并对合成产物的不同实验条件进行筛选优化,获得最佳的反应条件。结果表明,在以二氯甲烷为反应溶剂,20 mol%4-二甲氨基吡啶催化作用下,马来酰亚胺烯烃与吡唑酮烯烃物料配比为1/1.5的反应条件下可得到较高产率的产物,同时缩短合成目标产物的反应时间,高效合成目标产物,为进一步考察反应的普适性进行铺垫。 展开更多
关键词 马来酰亚胺烯 吡唑酮烯 含氮杂环化合物
下载PDF
上一页 1 2 31 下一页 到第
使用帮助 返回顶部