共查询到20条相似文献,搜索用时 15 毫秒
1.
Russian Journal of Organic Chemistry - New spiro heterocycles, spiro[benzo[h]chromene-4,3′-indoles] and spiro[benzo[f]chromene-1,3′-indoles], have been synthesized in 50–60% yield... 相似文献
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Mohammad Shahabuddin Keita Ohgoshi Md. Sharif Hossain Takao Kimura Michinori Karikomi 《Tetrahedron letters》2017,58(38):3704-3707
A new class of helical shaped bi-phenol (1,1′-bibenzo[c]phenanthrene-2,2′-diol; HEBPOL) type derivatives 2a–g were synthesized from quinone derivatives using the conventional 5% Pd-C catalytic reduction process. We obtained excellent yields for all of the 2a–g derivatives. The HEBPOLs were characterized by different analytical techniques including FTIR, 1H NMR, 13C NMR, MS and X-ray crystallography. 相似文献
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Abstract 2,2′,3,3′,5,5′-Hexaphenyl-[1,1′,-biphenyl]-4,4′-diol (Ib), which is prepared by the oxidative coupling of 2,3,6-triphenylphenol, and its oxidized form (IIIb) constitute a powerful oxidation-reduction system. The oxidative coupling reaction is carried out in the presence of molecular oxygen with copper(I) chloride as a catalyst and butyronitrile as ligand and solvent. An approach to the incorporation of such biphenols into an oxidation-reduction polymer is presented. 相似文献
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针对二苯并[d,f][1,3]二噁烷传统制备方法中易产生二羟基联苯乙烯副产物的缺点,本文以路易斯酸性胍盐离子液体为催化剂,2,2'-二羟基联苯和端基炔为原料,高区域选择性的合成了二苯并[d,f][1,3]二噁烷,收率39%~84%。 本方法适用于各种端基炔。路易斯酸性胍盐离子液体循环利用5次,活性不变。 相似文献
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Astrid Vogt Fabian Schwer Dr. Sebastian Förtsch Christoph Lorenz Dr. Elena Mena-Osteritz Anna Aubele Teresa Kraus Prof. Peter Bäuerle 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(48):12362-12370
A novel and versatile method for the N-arylation of dithieno[3,2-b:2′,3′-d]pyrrole (DTP) is presented. By Pd- or Cu-catalyzed coupling a variety of arenes and acenes were directly attached at the DTP−nitrogen yielding a variety of functionalized DTPs. Investigations on optical and redox properties led to valuable structure-property relationships, which were corroborated by quantum chemical calculations. Further functionalization and elongation of the conjugation of an acceptor-substituted DTP was elaborated to result in complex cruciform-type donor−acceptor oligomers, which were investigated and implemented in single material organic solar cells. 相似文献
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A series of symmetrical and unsymmetrical bibenzo[e][1,3]oxazine-2,2′-dione derivatives were synthesized by the reaction of various o-hydroxy Schiff bases and triphosgene induced by low-valent titanium reagent (TiCl4/Sm). A variety of substrates can participate in the process with good yields. The present method provides a useful preparation of 3,3′,4,4′-tetrahydro-4,4′-bibenzo[e][1,3]oxazine-2,2′-dione derivatives, which cannot be prepared otherwise. The mechanistic course of the reaction suggests the involvement of reduction, coupling, and cyclization by one-pot. 相似文献
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A novel and efficient method for the synthesis of mercaptothiophenes using cyanodithioic acids and their corresponding mono‐ and dithiolate salts as starting components is described. 相似文献
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《Tetrahedron: Asymmetry》2001,12(2):263-269
A six step synthesis and resolution of (±)-2,2′-bis(di-2-furylphosphino)-1,1′-binaphthalene 4 (TetFuBINAP) is described along with its use in asymmetric inter- and intramolecular Heck reactions. 相似文献
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《Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy》1982,38(9):961-964
It has been found that the u.v.-spectrum of the monospiro [(2,2′-dioxybinaphthyl-1,1′) cyclophosphazene] (3) closely resembles those of the other previously described 7-membered 2,2′-bridged 1,1′-binaphthyl derivatives. An hitherto unreported effect of the associated influence of α-substitution, β-coupling and the next cyclization on the u.v. absorption of naphthalene chromophore has been shown by the comparison of the electronic spectra of 1-naphthol (5), 1,1′-dihydroxybinaphthyl-2,2′ (6) and monospiro [(1,1′-dioxybinaphthyl-2,2′) cyclophosphazene] (7). Exclusively strong resonance interaction between the conjugated naphthalene rings was evidenced for 7. 相似文献
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Viktoria K. Muravieva Dr. Yakov M. Gayfulin Dr. Carmelo Prestipino Dr. Pierric Lemoine Dr. Maxim R. Ryzhikov Dr. Vadim V. Yanshole Dr. Stéphane Cordier Dr. Nikolay G. Naumov 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(66):15040-15045
Influence of the metal core composition and geometry on the structure, spectroscopic properties and redox potentials was investigated for the first time for heterometallic (Re/Mo)6 octahedral clusters. The discrete anionic clusters [Re6-xMoxSe8(CN)6]n− (x=2, 3; n=4, 5) were obtained as individual salts. Their isomeric composition and bond-length distribution were inspected using a combination of single-crystal X-ray structure analysis, NMR, EXAFS, and DFT calculations. 相似文献
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Abstract Cardo polysulfonates (PSBCB and PSBCT) of 1,1′-bis(4-hydroxy phenyl)cyclohexane with benzene-1,3 and toluene-2,4-disulfonyl chlorides have been synthesized by interfacial polycondensation of 1,1′-bis(4-hydroxy phenyl)cyclohexane (0.005 mol) with benzene-1,3/toluene-2,4-disulfonyl chlorides (0.005 mol) using water-chloroform (4:1, v/v) as interphase, alkali (0.015 mol) as acid acceptor, and cetyl trimethyl ammonium bromide (0.125 g) as emulsifier at 0°C for 3 hours. The structures of the polymers were supported by IR and NMR spectral data. The PSBCT was fractionated into several fractions by using 1,2-dichloroethane as solvent and n-butanol as precipitant. The fractions were characterized by GPC and viscometry in different solvents at four different temperatures. Viscosity studies showed that the PSBCT is flexible in solutions and has a specific solvent effect. PSBCB and PSBCT have good biological activity against E. coli and S. citrus organisms, and they possess excellent hydrolytic stability toward acids and alkalis. 相似文献
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A novel spiro-compound(C20 H15 N2 O3 P) has been synthesized and characterized by means of IR and 1H NMR. Its crystal structure was determined by X-ray diffractometry. The crystal belongs to the monoclinic system, space group P21 /c with a = 9.1628(7), b = 12.9490(7), c = 15.7898(11), β = 103.952(8)o, Mr = 36.08, V = 1818.2(2)3, Z = 4, Dc = 1.382 g/cm3, F(000) = 788, μ = 0.179 mm-1, R = 0.0701 and wR = 0.1513. The preliminary biological test showed that the title compound has activities against Escherichia coli, S.albus, Bacillus subtilis, Staphylocc- ocusaureus and Micrococcus tetragenus with MIC to be 0.038, 0.038, 0.075, 2.48, and 0.15 mg/mL, respectively. 相似文献
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2-Thioxo-1,2-dihydrobenzo[d][1,3]thiazin-4-one (TDBTO), a new thiazin-one derivative, was synthesized and investigated. The crystal structure of TDBTO (CsHsNOS2, Mr = 193.8) was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 6.946(3), b = 7.402(3), c = 8.954(4)A, α = 66.931(7)°,β = 89.866(7)°, γ = 72.289(7)°, V = 399.8(3) A^3, Z = 2, Mr = 195.25, Dc = 1.622 g/cm^3,μ = 0.606 mm^-1, F(000) = 200, R = 0.0361 and wR = 0.1032. There exist intermolecular hydrogen bond of N(1)-H(1A)-..O(1) and weak C(6)-H(6A)...O(1) contact in the structure as well as face-to-face π-π stacking interactions between the benzene ring and the thiazin ring of an adjacent benzothiazin unit. The photoinduced proton transfer reaction, transforming the initial thione into thiol form, was found, and the latter form was characterized by UV absorption spectra, fluo-rescence spectra and infrared spectra. 相似文献
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Koyo Matsuda Isao Yanagisawa Yasuo Isomura Toshiyasu Mase Tadao Shibanuma 《合成通讯》2013,43(14):2393-2402
Thioamides were treated with iodomethane, and then o,o′-diaminobiphenyl or bipyridyl to afford 6-substituted-5H-dibenzo- or dipyrido [1,3]diazepines in good yields. 相似文献
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Laura Frey Orlando Oliveira Dr. Ashish Sharma Roman Guntermann Soraia P. S. Fernandes Krystal M. Cid-Seara Hosanna Abbay Henry Thornes Prof. João Rocha Dr. Markus Döblinger Dr. Tim Kowalczyk Prof. Akshay Rao Dr. Laura M. Salonen Dr. Dana D. Medina 《Angewandte Chemie (International ed. in English)》2023,62(30):e202302872
A three-component synthesis methodology is described for the formation of covalent organic frameworks (COFs) containing extended aromatics. Notably, this approach enables synthesis of the building blocks and COF along parallel reaction landscapes, on a similar timeframe. The use of fragmental building block components, namely pyrene dione diboronic acid as aggregation-inducing COF precursor and the diamines o-phenylenediamine (Ph), 2,3-diaminonaphthalene (Naph), or (1R,2R)-(+)-1,2-diphenylethylenediamine (2Ph) as extending functionalization units in conjunction with 2,3,6,7,10,11-hexahydroxytriphenylene, resulted in the formation of the corresponding pyrene-fused azaacene, i.e., Aza-COF series with full conversion of the dione moiety, long-range order, and high surface area. In addition, the novel three-component synthesis was successfully applied to produce highly crystalline, oriented thin films of the Aza-COFs with nanostructured surfaces on various substrates. The Aza-COFs exhibit light absorption maxima in the blue spectral region, and each Aza-COF presents a distinct photoluminescence profile. Transient absorption measurements of Aza-Ph- and Aza-Naph-COFs suggest ultrafast relaxation dynamics of excited-states within these COFs. 相似文献
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In the presence of p-toluenesulfonic acid as the catalyst the three-component reactions of arylamines, acetylenedicarboxylates, and isatins showed very interesting molecular diversity. When equal amount of arylamine was used, the three-component reaction resulted in the high yields of functionalized 3′-hydroxyspiro[indoline-3,5′-pyrroline]-2,2′-dione derivatives. On the other hand the functionalized 3′-N-arylaminospiro[indoline-3,5′-pyrroline]-2,2′-diones were also successfully prepared in satisfactory yields by using 2 M arylamine in the reaction. 相似文献
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P. Haranath V. Sreedhar Kumar C. Suresh Reddy C. Naga Raju C. Devendranath Reddy 《合成通讯》2013,43(10):1697-1708
6‐Substituted‐dibenzo[d, f][1,3,2]dioxaposphepin‐6‐oxides, sulfides, and selenides (5a–i, 6a–d, and 7a–d) were synthesized by reacting 2,2′‐biphenol (1) with phosphorus tribromide in the presence of triethylamine at 0–30°C and subsequent reaction of the monobromide (2) with different Grignard reagents (3) at room temperature. The products (4) were converted to corresponding oxides, sulfides, and selenides (5a–i, 6a–d, and 7a–d) by oxidation with H2O2 at room temperature and refluxing with sulfur and selenium respectively. The chemical structures of all the products were confirmed by analytical, IR, NMR (1H, 13C, and 31P), and mass spectral data. Most of these compounds exhibited moderate antimicrobial activity. 相似文献
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Bakherad Mohammad Keivanloo Ali Gholizadeh Mostafa Doosti Rahele Javanmardi Mohaddese 《Research on Chemical Intermediates》2017,43(2):1013-1029
Research on Chemical Intermediates - A facile, eco-friendly, and highly efficient one-pot four-component protocol is demonstrated for the synthesis of the pyrano[2,3-c]pyrazole and... 相似文献