- DICYANSTYRYL BENZENE DERIVATIVES AND FLUORESCENT MATERIAL COMPRISING THE SAME
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The present invention refers to die [...] benzene derivatives represented by formula 1 are disclosed. The, head of the present invention die [...] benzene to yield fluorescent derivatives (Dicyanstyryl benzene) to minimize environmental pollution by reducing the drain diameter number fluorescent material can be [...] number can be improve. [Formula 1] (by machine translation)
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Paragraph 0346; 0349-0352
(2019/06/13)
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- Green synthesis method of 1,4-bis(2-cyanostyryl)benzene
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The invention discloses a green synthesis method of 1,4-bis(2-cyanostyryl)benzene, and belongs to the technical field of chemical synthesis. The green synthesis method comprises the following steps: adding excessive amount of triethyl phosphite and a solvent into a reactor under the normal pressure, heating, rapidly stirring an added dissolved cyanobenzylchloride solution, continuing to add the material, and conducting a thermal reaction to obtain a reactant; adding N,N-dimethylformamide (DMF) into the reactant, dissolving, stirring, respectively adding terephthalaldehyde and an alkali at equal molar weight, conducting a thermal reaction, cooling, regulating the PH value, cooling, centrifuging, refining with methyl alcohol, drying under the negative pressure, and pulverizing to obtain 1,4-bis(2-cyanostyryl)benzene; and centrifuging a mother solution, and distilling to obtain sodium diethylphosphate. The green synthesis method overcomes the defects of excessive phosphorus containing wastes, difficulty in separating and processing and the like, the production of sodium dihydrogen phosphate and other phosphorus containing wastes is greatly reduced, and sodium diethylphosphate having the industrial application value is achieved with the high yield.
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Paragraph 3; 6; 7; 8
(2018/03/01)
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- Application of Phase-Transfer Catalysis to the Synthesis of Mono- and Bis-stilbenes and Styryls
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A novel and convenient method has been developed for the synthesis of substituted stilbenes by the condensation of active methyl group in suitably substituted toluenes with aromatic aldehydes in aq. medium at room temperature using benzyltriethylammonium chloride as a phase-transfer catalyst.This method has also been applied for the preparation of heterocyclic styryls and extended to the synthesis of bis-stilbenes and bis-styryls using aromatic dialdehydes in place of monoaldehydes.A comparison of the results shows that the present method is superior to the conventional methods in many respects.
- Lokhande, S. B.,Rangnekar, D. W.
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p. 485 - 488
(2007/10/02)
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