- A prototype of benzobis(imidazolium)-embedded conjugated polyelectrolyte: synthesis by direct C?H arylation and fluorescent responses to anions
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We report the convenient synthesis of a benzobis(imidazolium)-embedded conjugated polyelectrolyte pBBI by a Cu-catalyzed direct C?H arylation of a cationic benzobis(imidazolium) monomer with a diiodide comonomer. pBBI shows weak fluorescence in solution due to rotation of the repeat units in the conjugated backbone, and enhanced fluorescence when electrostatically interacting with a variety of anions to form aggregates. Specially, pBBI responds to the bisulfite anion with intensified unique deep-blue fluorescence easily discriminated by naked eye.
- Gao, Ge,Wang, Linhua,Wang, Tianbao,Yu, Chuangui,Zheng, Qinze,Zheng, Xuesong
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- Preparation method of 1, 5-dichloro-2, 4-dinitrobenzene
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The invention discloses a preparation method of 1, 5-dichloro-2, 4-dinitrobenzene. The preparation method comprises the following steps: preparing 1, 5-dichloro-2, 4-dinitrobenzene by using m-dichlorobenzene as a raw material and N-nitropyrazole and H2SO4 as nitrating agents; the method specifically comprises the following steps: adding 8ml of 98% sulfuric acid into a four-neck bottle, dropwise adding 0.012 mol of m-dichlorobenzene into concentrated sulfuric acid under the conditions of mechanical stirring and the temperature of 20 DEG C, heating in a water bath to 60 DEG C after charging is completed, averagely dividing 0.024 mol of N-nitropyrazole into four parts, sequentially adding the four parts of N-nitropyrazole at the temperature, heating the reaction system in the adding process, adding materials again after the temperature is reduced to the initial temperature, keeping stirring after the materials are added, reacting at the constant temperature of 65 DEG C for 6 hours, pouring reaction liquid into a container filled with ice blocks while the reaction liquid is hot, and stirring to reduce the temperature of the solution to 5 DEG C to precipitate suspended solids.
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Paragraph 0014-0015
(2021/07/10)
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- Synthesis method of flumioxazin
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The invention provides a synthesis method of flumioxazin, and belongs to the field of pesticide synthesis. According to the invention, the method solves the problems of many steps, low yield and the like in the existing flumioxazin synthesis process, has the following synthetic route defined in the specification, and has high yield.
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Paragraph 0045-0047
(2020/01/25)
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- Method for synthesizing 2-(5-fluoro-1, 5 dinitro-phenoxy) acetate
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The invention discloses a method for synthesizing 2-(5-fluoro-1, 5 dinitro-phenoxy) acetate. 2, 4-dichloronitrobenzene serves as a raw material, nitration reaction is performed to obtain 2, 4-dichloro-1, 5-dinitrobenzene, the quantity of fluorinating agents and reaction conditions are controlled in aprotic polar solvents DMF, fluorination reaction with potassium fluoride is performed to obtain 2-fluoro-4-chloro-1, 5-dinitrobenzene, and the 2-fluoro-4-chloro-1, 5-dinitrobenzene is polarized in the etherified aprotic polar solvents DMF and subjected to etherification reaction with hydroxy acetate under the action of acid-binding agents and catalysts to obtain the 2-(5-fluoro-1, 5 dinitro-phenoxy) acetate. In addition, raw materials are inexpensive and easy to obtain, operation is simple andconvenient, technological conditions of reaction in all steps are mild, the method is high in safety and short in reaction time, and industrial production can be popularized.
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Paragraph 0027-0028
(2019/05/28)
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- Synthetic method of pesticide intermediate for synthesizing flumioxazin
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The invention provides a synthetic method of a pesticide intermediate for synthesizing flumioxazin, and belongs to the field of pesticide synthesis. The synthetic method solves the problem that the yield of existing synthetic 7-fluoro-6-amino-2H-1,4-benzoxazine-3(4H)-one is not high. The synthetic route of the synthetic method of the pesticide intermediate for synthesizing flumioxazin is shown inthe specification, and the yield is high.
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Paragraph 0024; 0025; 0026
(2020/01/12)
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- Cu-catalysed oxidative C-H/C-H coupling polymerisation of benzodiimidazoles: An efficient approach to regioregular polybenzodiimidazoles for blue-emitting materials
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The Cu-catalysed oxidative C-H/C-H coupling reaction of azoles has been used for the first time to develop polymerisation, which provides an efficient method for the preparation of polybenzodiimidazoles. These polymers exhibit high molecular weights, regioregularity, blue-emitting performance and thermal stability. This journal is
- Huang, Quan,Qin, Xurong,Li, Bijin,Lan, Jingbo,Guo, Qiang,You, Jingsong
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supporting information
p. 13739 - 13741
(2014/12/11)
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- 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS
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New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment.
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Paragraph 0090
(2013/03/26)
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- 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS
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New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment.
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Paragraph 0085
(2013/03/26)
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- A tandem Friedel-Crafts based method for the construction of a tricyclic pyrroloquinoline skeleton and its application in the synthesis of ammosamide B
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A total synthesis of ammosamide B (2), a member of the pyrroloquinoline alkaloid family isolated from marine Streptomyces, is described. The characteristic core tricyclic structure of 2 was constructed using a novel, tandem Friedel-Crafts reaction sequence to transform the symmetric tetra-amino substituted benzene derivative 7 into the tricyclic pyrroloquinoline product 8, which serves as an important intermediate in the route to the synthesis of the target natural product.
- Takayama, Yohei,Yamada, Tatsuya,Tatekabe, Shinya,Nagasawa, Kazuo
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supporting information
p. 6519 - 6521
(2013/07/26)
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- Process for the preparation of derivatives of tetraaminobenzene
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A process is provided for preparing complexes of 1,2,4,5-tetraminobenzene with an aromatic diacid. The process design eliminates costly intermediate drying and recrystallization steps. Handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.
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Page/Page column 18
(2012/04/04)
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- 2,4,5-TRIAMINOTHIOPHENOLS AND RELATED COMPOUNDS
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New triaminothiophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts, diacid complexes, and polymers from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment.
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Page/Page column 29-30
(2012/07/13)
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- 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS
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New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment.
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Page/Page column 39
(2011/08/03)
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- Process for the synthesis of dihalodinitrobenzenes
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A process is provided for the preparation of 1,3-dihalo-4,6-dinitrobenzene by the nitration of 1,3-dihalobenzene. The direct isolation of highly pure 1,3-dihalo-4,6-dinitrobenzene is accomplished without a water or ice quench, and involves the use of at least one equivalent of SO3 during the reaction, slow crystallization, and isolation of product from a cold crystal slurry.
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Page/Page column 6
(2011/09/15)
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- 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS
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New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment.
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Page/Page column 38
(2011/08/03)
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- 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS
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New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment.
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Page/Page column 38
(2011/08/03)
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- Designing Structural Motifs for Clickamers: Exploiting the 1,2,3-Triazole Moiety to Generate Conformationally Restricted Molecular Architectures
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Noncovalent interactions, especially hydrogen-bonding interactions as well as electrostatic forces, confined within one macromolecule are the key to designing foldamers that adopt well-defined conformations in solution. In the context of significant recent activities in the area of triazole-connected foldamers, so-called clickamers, we present a fundamental study that compares various model compounds that bear adjacent N-, O-, or F-heteroatom substituents. The interplay of attractive and repulsive interactions leads to rotational constraints around the single bonds attached to both the 1- and 4-positions of the 1,2,3-triazole moiety and should therefore be able to induce well-defined conformational preferences in higher oligomers and polymers, that is, foldamers. Various compounds were synthesized and characterized with regard to their preferred conformations in all three aggregation statesa-that is, in the gas phase, in solution as well as in the solid statea-by employing DFT calculations, NMR spectroscopic experiments, and X-ray crystallography, respectively. On the basis of the thus-obtained general understanding of the conformational behavior of the individual connection motifs, heterostructures were prepared from different motifs without affecting their distinct folding characteristics. Therefore, this work provides a kind of foldamer construction kit, which should enable the design of various clickamers with specific shape and incorporated functionality. A foldamer construction kit: Various heterostructures "clicked" together by structure-directing triazole moieties were investigated with regard to their conformational behavior. Different heteroatoms (X; see graphic) can be used to bias the conformation around the N(1)- and C(4)-connecting single bonds of the triazoles based on tunable noncovalent interactions.
- Zornik, Denise,Meudtner, Robert M.,Ela Malah, Tamer,Thiele, Christina M.,Hecht, Stefan
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supporting information; scheme or table
p. 1473 - 1484
(2011/04/15)
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- Thermochromism of a novel organic compound in the solid state via crystal-to-crystal transformation
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A novel thermochromic organic compound, 1,5-bis(hydroxyethylamino)-2,4-dinitrobenzene (BDB), was synthesized and characterized using X-ray diffraction, differential scanning calorimetry, visible and infrared spectroscopy. It was observed that BDB exists in two different crystal structures of A- and B-forms at room temperature. In each crystal structure, there exist intra- and intermolecular hydrogen bonds between hydroxy, amino, and nitro groups. As the temperature is increased, the color of BDB crystalline powder changes from yellow to orange. The yellow color was recovered for a specific period of time when it is cooled again, indicating that thermochromism of BDB in the solid state is reversible. Both crystals of A- and B-forms are transformed to the C-form crystal at the transition temperature. From the results of X-ray diffraction, thermal data, and infrared spectra, it is suggested that the thermochromism of BDB originates from the crystal-to-crystal transition accompanying with the configurational transformation between nitro-form and acid-form via intramolecular hydrogen transfer.
- Lee, Sang Cheol,Jeong, Young Gyu,Jo, Won Ho,Kim, Hee-Joon,Jang, Jinho,Park, Ki-Min,Chung, Ihn Hee
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- Process for preparing 4,6-diamino-resorcinol dihydrochloride
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PCT No. PCT/EP97/02409 Sec. 371 Date Nov. 17, 1998 Sec. 102(e) Date Nov. 17, 1998 PCT Filed May 12, 1997 PCT Pub. No. WO97/44311 PCT Pub. Date Nov. 27, 1997The invention concerns 4,6-diamino-resorcinol which is prepared in the form of its dihydrochloride by catalytic hydrogenation of 1,3-benzyloxy-4,6-dinitrobenzene on a noble metal contact in a two-phase mixture of dilute aqueous hydrochloric acid and an organic solvent which is not miscible with dilute aqueous hydrochloric acid. This process is carried out at a pressure of between 1 and 200 bar and a temperature of between 0 and 200 DEG C.
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- Synthesis of amino-substituted 1,3-bis(tert-butyl-NNO-azoxy)benzenes 1. 4-Amino and 4,6-diamino derivatives
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Oxidation of 4,6-dichloro-1,3-phenylenediamine with Caro's acid yields the corresponding dinitrosobenzene, which reacts with N,N-dibromo-tert-butylamine to give 1,5-bis(tert-butyl-NNO-azoxy)-2,4-dichlorobenzene. Treatment of the latter with ammonia yields 4-amino-and 4,6-diamino-1,3-bis(tert-butyl-NNO-azoxy)benzenes.
- Frumkin,Churakov,Strelenko,Smirnov,Ioffe,Tartakovsky
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p. 1295 - 1298
(2007/10/03)
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- Process for the preparation of 4,6-diaminoresorcinol
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4,6-diaminoresorcinol can be prepared in a plurality of steps in such a way that a) 1,3-dichlorobenzene is nitrated with a mixed acid of HNO3, H2 SO4 and SO3 at 0 to 40° C. in anhydrous H2 SO4, b) the resulting 1,3-dichloro-4,6/2,4-dinitrobenzene isomeric mixture is first reacted with benzyl alcohol in the presence of a strong base at -15° C. to +15° C. and then at 20° to 40° C. to give the dibenzyloxy compound and c) the 1,3-dibenzyloxy-4,6-dinitrobenzene isomer arising in pure form in b) is converted to the 4,6-diaminoresorcinol by catalytic hydrogenation.
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- 2,4-bis-aryloxy-m-phenylenediamines and their use as couplers in oxidation dye compositions
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Compounds of formula: STR1 and oxidation hair dye compositions containing the same; also includes a process for dyeing hair with such compositions; Ar being an aryl radical.
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- Synthesis of 1,5-Diamino-1,5-dihydrobenzobistriazole (DABT) and Its Use as a 1,4-Benzadiyne Equivalent
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Amination of 1,5-dihydrobenzobistriazole (9) gives the 1,5- and 1,7-diamino derivatives 3 and 10 both useful as 1,4-benzadiyne equivalents, as well as the 1,6 isomer 11 and the recyclable monoamino derivatives 12 and 13.Sixteen examples of the synthetic utility of DABT (3) with lead tetraacetate in bisannulations are described (Table 1).The aryne-trapping dienes include ester, halogen, and carbonyl functionality; often the reactions are quite regio- and stereoselective as a consequence of the stepwise nature of the annulations.
- Hart, Harold,Ok, Dong
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p. 979 - 986
(2007/10/02)
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- Novel N-phenyl-substituted N-heterocyclic compounds, their preparation and use in agents for regulating plant growth
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The present invention relates to novel active compounds having a plant growth-inhibiting and herbicidal action and their preparation and to agents containing these active ingredients, and their use. The novel active compounds are saturated and unsaturated 4-membered to 7-membered ring nitrogen heterocyclic compounds which are substituted on the nitrogen atom by a phenyl radical which itself carries a trifluoromethanesulphonamido group -NH-SO2 -CF3 as a substituent. The phenyl radical can also carry other substituents and the heterocyclic structure can also be substituted. Oxo derivatives of the heterocyclic compound, in which the oxo group is preferably adjacent to the nitrogen atom, form a preferred sub-group of compounds.
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- N-Phenyl-substituted N-heterocyclic compounds, their preparation and use in agents for regulating plant growth
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The present invention relates to novel active compounds having a plant growth-inhibiting and herbicidal action and their preparation and to agents containing these active ingredients, and their use. The novel active compounds are saturated and unsaturated 4-membered to 7-membered ring nitrogen heterocyclic compounds which are substituted on the nitrogen atom by a phenyl radical which itself carries a trifluoromethanesulphonamido group --NH--SO2 --CF3 as a substituent. The phenyl radical can also carry other substituents and the heterocyclic structure can also be substituted. Oxo derivatives of the heterocyclic compound, in which the oxo group is preferably adjacent to the nitrogen atom, form a preferred sub-group of compounds.
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