Red light emitting fluorescent dye, synthesizing process and use thereof
A fluorescent dye and red light technology, applied in the field of fluorescent dye synthesis, can solve the problems of high price, low yield, complex synthesis method, etc., and achieve the effect of separation and purification
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[0057] Example 1: Synthesis of asymmetric pyrone with the above-mentioned P14 structure:
[0058]
[0059] Add 200ml of anhydrous ethylene glycol dimethyl ether into a 1000ml three-necked flask equipped with a mechanical stirrer, a constant pressure dropping funnel and a gas pipe. Under nitrogen protection, add 18g of sodium hydride (60%, 0.45mol), and heat Reflux, slowly add 0.15mol of acetylacetone (1) in 100ml of ethylene glycol dimethyl ether solution dropwise under constant stirring. After the addition is completed after 40 minutes, heat and stir for 40 minutes, and then add 0.15mol of tert-butyl Quickly pour 100 ml of the ethylene glycol dimethyl ether solution of ethyl ester (2) into the reaction flask, and the whole process should not exceed 2 minutes, and then reflux the reaction solution for 4 to 8 hours. Then, under reduced pressure, most of the ethylene glycol dimethyl ether solvent was evaporated. The obtained paste was added with 150ml of ether under the condition ...
Example Embodiment
[0070] Example 2: With general formula M 1 Synthesis of structure Y1
[0071]
[0072] Add 4-(1,3-indenedione)-2-methyl-6-tert-butyl-pyran (structure A 1 ) 1mmol, N,N-bis-(4-formylphenyl)aniline (structure D 101 ) 1mmol, 30ml acetonitrile, 0.40ml hexahydropyridine, heated to reflux for 24 hours. Cool, filter the reaction liquid, get the solid, rinse with ethanol several times, use DMF / CHCl 3 The mixed solution was recrystallized to obtain product Y1 with a yield of 74%.
[0073] Elemental analysis calculated value (C 38 H 31 NO 3 ): C, 83.03; H, 5.68; N, 2.55;
[0074] Measured value: C, 83.04; H, 5.68; N, 2.54;
[0075] Mass Spectrometry (MS + ):549(M + )
Example Embodiment
[0076] Example 3: With general formula M 7 Synthesis of structure Y2
[0077]
[0078] Add 4-(1,3-indenedione)-2-methyl-6-tert-butyl-pyran (structure A 1 ) 1mmol, D 122 1.2mmol, 35ml acetonitrile, 0.50ml hexahydropyridine, heated to reflux for 24 hours. The post-processing method is the same as in Example 2, product Y 2 , The yield is 74%.
[0079] Elemental analysis calculated value (C 42 H 33 NO 3 ): C, 84.11; H, 5.55; N, 2.34;
[0080] Measured value: C, 84.10; H, 5.57; N, 2.35;
[0081] Mass Spectrometry (MS + ): 599(M + ).
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