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邻苯二酚、3,5-二叔丁基邻苯二酚分别与1,5-二氯-3-氧(杂)戊烷在碱性条件下反应, 合成了开链冠醚化合物(1a-b)。1a-b与环氧氯丙烷在氢氧化钠正丁醇中缩合, 得到相应的6-羟基二苯并-16-冠-5(2a-b)。化合物2a-b分虽与丁二酰氯、壬二酰氯在无水苯中反应, 生成了两种新的酯型双冠醚化合物3a-b; 2a-b分别与1,3-二溴丙烷、1,4-二溴丁烷、1,5-二溴戊烷、1,8-二氯-3,6-二氧(杂)辛烷及1,11-二氯-3,6,9-三氧(杂)十一烷在无水二氧六环中反应, 得到了四种新的醚型双冠醚化合物4a-e。 相似文献
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邻苯二酚、3,5-二叔丁基邻苯二酚分别与1,5-二氯-3-氧(杂)戊烷在碱性条件下反应, 合成了开链冠醚化合物(1a-b)。1a-b与环氧氯丙烷在氢氧化钠正丁醇中缩合, 得到相应的6-羟基二苯并-16-冠-5(2a-b)。化合物2a-b分虽与丁二酰氯、壬二酰氯在无水苯中反应, 生成了两种新的酯型双冠醚化合物3a-b; 2a-b分别与1,3-二溴丙烷、1,4-二溴丁烷、1,5-二溴戊烷、1,8-二氯-3,6-二氧(杂)辛烷及1,11-二氯-3,6,9-三氧(杂)十一烷在无水二氧六环中反应, 得到了四种新的醚型双冠醚化合物4a-e。 相似文献
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氯甲酸乙酯和3,6-二苯基-1,2-二氢-1,2,4,5-四嗪反应生成的是标题化合物3,6-二苯基-1,2-二氢-1,2,4,5-四嗪-1,2-二甲酸乙酯,而不是预期的3,6-二苯基-1,4-二氢-1,2,4,5-四嗪-1,4-二甲酸乙酯,其结构通过X射线单晶结构分析得以证实.此晶体属三斜晶系,P-1空间群,晶胞参数分别为:a=0.8915(2)nm,b=1.0444(2)nm,c=1.1509(3)nm,α=103.268(3)°,β=102.844(3)°,y=100.765(3)°,Z=2,R1=0.0593和wR2=0.1691.结果表明该化合物中心六元环的2,3-二氮杂丁二烯基团不共平面,没有很好地共轭.且该化合物中心六元环呈扭式构象,N(1)和N(2)原子分别偏离环平面-0.03611(41)和0.02944(40)nm. 相似文献
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应用正相硅胶、凝胶SephadexLH20柱色谱和反相HPLC等方法,从多管藻(Polysiphoniaurceolata)中分离得到6个溴酚类化合物,通过IR、MS、1D和2DNMR等波谱技术分析鉴定,发现一个有明显的PTP1B抑制活性(IC50=4·9μg/mL)的新化合物:3-溴-4-[3-溴-4,5-二羟基苯基]甲基-5-羟甲基-1,2-二苯酚(1)。另5个已知化合物分别为3-溴-4,5-二羟基苄基乙基醚(2)、3-溴-4,5-二羟基苯甲醇(3)、3-溴-4,5-二羟基苯甲醛(4)、3,5-二溴-4-羟基苯甲醛(5)、3,5-二溴-4-羟基苯甲醇(6)。 相似文献
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报道了一种新型Frétchet树枝配体取代酞菁锌(II)配合物:四-{3,5-二-[3,5-二-(4-羧基苯甲氧基)苯甲氧基]-苯甲氧基}酞菁锌(II)的合成与表征.首先将对氰基苄溴与3,5-二羟基苯甲醇通过Frétchet反应合成3,5-[二-(4-氰基苯甲氧基)]苯甲醇(1),1与四溴化碳和三苯基膦在四氢呋喃中反应合成3,5-二-(4-氰基苯甲氧基)苄溴(2),2与3,5-二羟基苯甲醇反应合成3,5-二-[3,5-二-(4-氰基苯甲氧基)苯甲氧基]苯甲醇(3),接着,3与4-硝基邻苯二甲腈合成"前驱物"四-{3,5-[二-(4-氰基苯甲氧基)]}苯甲氧基邻苯二甲腈(4),然后以1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)为催化剂,醋酸锌为模板剂,4通过缩聚反应合成氰基端基的Frétchet树枝配体取代酞菁锌四-{3,5-二-[3,5-二-(4-氰基苯甲氧基)苯甲氧基]-苯甲氧基}锌酞菁配合物5,最后,5的氰基端基在NaOH溶液中水解为相应的以羧基端基Frétchet树枝配体取代酞菁锌:四-{3,5-二-[3,5-二-(4-羧基苯甲氧基)苯甲氧基]-苯甲氧基}酞菁锌(II)(6).采用元素分析,IR,1H NMR,ESI-MS和MALDI-TOF-MS表征所有化合物的结构,通过UV/Vis,稳态和瞬态荧光光谱法研究了5和6的光物理性质.5和6是一类性能较好的树枝状酞菁光敏剂. 相似文献
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以3,5-二甲基苯酚为原料,经4步反应合成了1,1’-【{5-[3-(乙酰硫基)丙氧基]-1,3-亚苯基}双(亚甲基)】双{[(4,4’-联吡啶)-1-鎓]}二六氟磷酸盐(4);4与1,4-二溴甲基苯和萘模板在低温反应制得含硫代乙酸酯的缺电子环蕃(5);5经连续萃取及离子交换除去萘模板合成了新型含硫代乙酸缺电子环蕃——5,13,20,27-四氮杂七环[25,2,2,22,5,17,11,213,16,217,20,222,25]四十-9-(1-丙基硫代乙酸酯)氧-1(28),2,4,7,9,12,14,16,18,21,23,26,29,31,33,35,37,39-十八烯四六氟磷酸盐(6),其结构经1H NMR和13C NMR表征。 相似文献
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M. D. Coburn G. A. Buntain B. W. Harris M. A. Hiskey K.-Y. Lee D. G. Ott 《Journal of heterocyclic chemistry》1991,28(8):2049-2050
A new synthesis for the title compound that gives an 80% overall yield was developed. Treatment of triaminoguanidine monohydrochloride ( 1 ) with 2,4-pentanedione ( 2 ) gave 3,6-bis(3,5-dimethylpyrazol-1-yl)-1,2-dihydro-1,2,4,5-tetrazine ( 3 ) in 80–85% yield. Oxidation of 3 with nitric oxide or nitrogen dioxide to 3,6-bis(3,5-dimethyylpyrazol-1-yl)-1,2,4,5-tetrazine ( 4 ) followed by ammonolysis of 4 gave 3,6-diamino-1,2,4,5-tetrazine ( 5 ) in guantitatively yields. 相似文献
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Reaction of Ph2Si(NHNHMe)2 ( 1 ) with n-BuLi and Ph2SiCl2 in 1 : 2 : 1 ratio afforded 54% of 1,2,4-triaza-1-methyl-4-methylamino-3,3, 5, 5-tetraphenyl-3,5-disilacylopentane ( 2 ). In the presence of a catalytic amount of n-BuLi, 2 is rearranged to two isomers, 1,2,4,5-tetraaza-1,4-dimethyl-3,3,6,6-tetraphenyl-3,6-disilacyclohexane ( 3 ) and 1,2,4,5-tetraaza-1,5-dimethyl-3,3,6,6-tetraphenyl-3,6-disilacyclohexane ( 4 ), with 3 as the major product. The crystal structure of 3 reveals a twist-boat conformation of the Si2N4 ring [a = 10.691(4) Å, b = 13.178(4) Å, c = 17.812(3) Å, β = 95.11(7)°; monoclinic, P21/n; Z = 4], in which each N(Me) N(H) unit contains one pyramidal (NH) and one planar (NMe) nitrogen. 相似文献
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G. L. Rusinov R. I. Ishmetova N. I. Latosh I. N. Ganebnych O. N. Chupakhin V. A. Potemkin 《Russian Chemical Bulletin》2000,49(2):355-362
A number of 1,4-dihydropyridazines and pyridazines were prepared by the Diels-Alder reaction with an inverse electron demand
from cyclic heterodiene systems, 3,6-bis(3,5-dimethyl-4-R-pyrazol-1-yl)-1,2,4,5-tetrazines, and some enamines as well as from
4-vinylpyridine, butyl vinyl ether, phenylacetylene, and acrylamide. The reaction of 3,6-bis(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine
with styrene afforded 4,5-dihydropyridazine, which was readily oxidized by atmospheric oxygen to form the corresponding pyridazine.
Electron-withdrawing substituents (Br or Cl) in the pyrazole rings accelerate [4+2]-cycloaddition. When heated, 1,4-dihydropyridazines,
which were synthesized from tetrazines and enamines, eliminated amine to give pyridazines. The reactivities of tetrazines
were evaluated by quantum-chemical methods.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 354–360, February, 2000. 相似文献
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CHEN Xiang ZENG Tian ZHANG Cong GUO Zhaoqi LI Shuailei MAI Tao GAO Rong MA Haixia 《高等学校化学研究》2018,34(6):959-964
Two energetic salts, DPHT·DNS·H2O(1) and DHT·2DNS·2H2O(2)[DPHT=3-(3,5-dimethyl-1H-pyrazol-1-yl)-6-hydrazinyl-1,2,4,5-tetrazine; DHT=3,6-dihydrazinyl-1,2,4,5-tetrazine], were synthesized from S-tetrazine with 3,5-dinitrosalicylic acid(DNS). Compounds 1 and 2 were structurally characterized by elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction. The thermal behavior of the title compounds was studied by differential scanning calorimetry(DSC) and thermogravimetry(TG). The non-isothermal decomposition kinetics of compound 2 were investigated. The self-accelerating decomposition temperature, thermal ignition temperature, and critical temperatures of thermal explosion were obtained to evaluate the thermal safety of compound 2. The results show compounds 1 and 2 decompose at 150.8 and 179.2℃, respectively. The TSADT and Tb of compound 2 are higher than those of DHT, which indicates compound 2 is a potential candidate for energetic materials that have good thermal stability. 相似文献
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R. I. Ishmetova N. I. Latosh I. N. Ganebnykh N. K. Ignatenko S. G. Tolshchina G. L. Rusinov 《Russian Journal of Organic Chemistry》2009,45(7):1102-1107
Reactions of 3,6-bis(4-R-3,5-dimethyl-1H-pyrazol-1-yl)-1,2,4,5-tetrazines and 3-amino-6-(3,5-dimethyl-1H-pyrazol-1-yl)-1,2,4,5-tetrazines with aliphatic alcohols and water in the presence of a base involved replacement of the dimethylpyrazolyl group and resulted in the formation of mono- and dialkoxy-1,2,4,5-tetrazines and 6-substituted 3-hydroxy-1,2,4,5-tetrazines. Dissociation constants of the latter were determined by potentiometric titration. 相似文献
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Judith L. Johnson Barbara Whitney Leslie M. Werbel 《Journal of heterocyclic chemistry》1980,17(3):501-506
Alkylation of tetrahydro-1,2,4,5-tetrazine-3,6-dithione with iodomethane and 1,2-dichloro-4-(chloromethyl)benzene, respectively (Scheme 1, 4 ) followed by oxidation afforded 3,6-bis(methylthio)- and 3,6-bis[[(3,4-dichlorophenyl)methyl]thio]-1,2,4,5-tetrazines ( 6, 15 ). The reaction of 15 with amines provided the 6-[(arylmethyl)thio]-1,2,4,5-tetrazin-3-amines ( 16) while sequential displacement of both methylthio groups in 6 afforded the tetrazine-diamines 8 and 10 . Hydrolysis of N,N-dimethyl-6-(methylthio)-1,2,4,5-tetrazin-3-amine ( 11 ) with potassium hydroxide afforded the tetrazin-3-ol ( 12 ) which was chlorinated and then treated with 4-chlorobenzenethiol to provide 13 . The target 6-substituted-1,2,4,5-tetrazin-3-amines displayed negligible antimalarial activity. 相似文献
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Cooke G Máille GM Quesada R Wang L Varughese S Draper SM 《Dalton transactions (Cambridge, England : 2003)》2011,40(32):8206-8212
This article reports the preparation of a range of phenyl, pyridyl and pyrazinyl substituted pyridazines via the inverse electron demand [2 + 4] Diels-Alder reaction between 3,6-di(2-pyridyl)-1,2,4,5-tetrazines (bptz) and 3,6-di(2-pyrazinyl)-1,2,4,5-tetrazines (bpztz) and suitable dienophiles including acenaphthalene. The resulting polyaromatic compounds vary systematically in the number of aromatic substituents and the number and position of N-heteroatoms. For four of these compounds, the effect of the molecular changes on the solid-state structures were investigated using single crystal X-ray crystallography. The pyridazines were used as bidentate ligands in {M(II)(bipy)(2)} and tris(homoleptic) complexes (M = Fe, Ru). The optical and electrochemical properties of these complexes reflect the electron accepting character of the new ligands. The facial and meridional isomers of the tris complexes could be separated by column chromatography (on silica), thus allowing a spectral comparison of their absorption and emission properties. The solid-state structures of several of the metal complexes are discussed, including that of the facial isomer of the tris Ru(II) complex of 3,6-bis(2-pyridyl)-4,5-bis(4-pyridyl)pyridazine--a potential preformed geometric motif for the predirected construction of supramolecular assemblies. 相似文献
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The synthesis of the previously unknown parent ring system was developed. Treatment of 3-hydrazino-1,2,4,5-tetrazine ( 4 ) with diethoxymethyl acetate gave the parent ring system. Similar treatment of 3-(3,5-dimethylpyrazol-1-yl)-6-hydrazino-1,2,4,5-tetrazine ( 2 ) with one carbon cyclizing reagents gave 3,6-di-substituted derivatives of the 1,2,4-triazolo-1,2,4,5-tetrazine ring system. 相似文献
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Phenyl-4,4-di(3,6-dibutoxyphthalonitrile) ( 3 ) was synthesized by the reaction of 1,4-phenylenebisboronic acid ( 1 ) and 4-bromo-3,6-dibutoxyphthalonitrile ( 2 ), using Suzuki cross-coupling reaction. The newly synthesized compound ( 3 ) was characterized by FT-IR, MALDI-MS, ESI-MS, 1 H-NMR, 13 C-NMR, and 13 C-DEPT-135-NMR. The fluorescence property of phenyl-4,4-di(3,6-dibutoxyphthalonitrile) ( 3 ) towards various metal ions was investigated by fluorescence spectroscopy, and it was observed thatthe compound ( 3 ) displayed a significantly ‘turn-off’ response to Fe 3+ , which was referred to 1:2 complex formation between ligand ( 3 ) and Fe 3+ . The compound was also studied via density functional theory calculations revealing the interaction mechanism of the molecule with Fe 3+ ions. 相似文献
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2,3-Dicarbomethoxy-7,7-dimethyl-7-silabicyclo[2.2.1]hepta-2,5-diene (III) on photolysis gave dimethyl tetraphenylphthalate whereas the photolysis of 7,7-dimethyl-7-silabicyclo[2.2.1]hep-5-ene-2,3-dicarboxylic anhydride (XIa) resulted in the formation of 1,1-dimethyl-2,3,4,5-tetraphenyl-1-silacyclopentadiene (XIIIa). The thermolysis of XIa also gave rise to XIIIa. Similarly, the photolysis as well as thermolysis of 1,4,5,6,7,7-hexaphenyl-7-silabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride (XIb) led to hexaphenylsilacyclopentadiene (XIIIb). Attempts to detect radical intermediates in these thermal and photochemical transformations by carrying out the reaction in the presence of hydroquinone, hydrazobenzene, 3,6-diphenyl-1,2-dihydro-1,2,4,5-tetrazine, cumene and tolan were unsuccessful. An attempted preparation of 7-silabicyclo[2.2.1]hepta2,5-dienes by the reaction of silacyclopentadienes such as 1-methyl-1-vinyl2,3,4,5-tetraphenyl-1-silacyclopentadiene (XV) and 1-methyl-1,2,3,4,5-pentaphenyl-1-silacyclopentadiene (XVI) with dimethyl acetylenedicarboxylate resulted in the isolation of dimethyl tetraphenylphthalate indicating that the corresponding 7-silabicyclo[2.2.1]hepta-2,5-dienes are thermally unstable. 相似文献