64327-01-1Relevant academic research and scientific papers
Coumarin-pyridine push-pull fluorophores: Synthesis and photophysical studies
Chupakhin, Oleg N.,Fatykhov, Ramil F.,Khalymbadzha, Igor A.,Kopchuk, Dmitry S.,Nikonov, Igor L.,Savchuk, Maria I.,Sharapov, Ainur D.,Shtaitz, Yaroslav K.,Starnovskaya, Ekaterina S.,Zyryanov, Grigory V.
supporting information, (2021/11/11)
A series of coumarin-pyridine-based push-pull fluorophores were prepared starting from 1,2,4-triazines by using direct C-H functionalization (SNH-reaction)–Diels-Alder–retro Diels-Alder domino reaction sequence. This efficient synthetic strategy allowed to obtain a series of 19 coumarin-pyridine fluorophores. Their photophysical properties were studied. While pyridine-substituted derivatives of 4-alkylcoumarins may be considered as alternative to coumarin dyes characterized by emission maxima mainly in a visible region with wavelengths of 402–415 nm, absorption in the UV range at 210–307 nm, and good photoluminescence quantum yields of 6–19%, all the derivatives of 4-phenylcoumarin did not exhibit any noticeable fluorescence. More detailed photophysical studies were carried out for two the most representative derivatives of 4-alkyl-coumarin-pyridines to demonstrate their positive solvatochromism, and the collected data were analyzed by using Lippert-Mataga equation, as well as Kosower and Dimroth/Reichardt scales. The obtained results demonstrate that the combining two chromophore systems, such as 2,5-diarylpyridine and coumarin ones, is promising in terms of improving the photophysical properties of the new coumarin-pyridine hybrid compounds.
Preparation method of phenyl triazine compound and preparation method of phenyl pyridine compound
-
Paragraph 0107; 0108, (2018/10/19)
The invention relates to the technical field of compound synthesis, in particular to a preparation method of phenyl triazine compound and preparation method of the phenyl pyridine compound, the preparation method of phenyl triazine compound and preparation method of phenyl pyridine compound takes the compound having the structure represented by the formula (I), the compound having the structure represented by the formula (II), organic protic acid, the ammonium salt and the first organic solvent to undergo nucleophilic addition reaction and ring reaction to prepare the phenyl triazine compoundwith the structure shown by the formula (III), no noble metal catalyst is needed in the reaction, the reaction yield and the purity are higher, and then carries out inverse Diels-Alder reaction with the phenyl triazine compound prepared by the above method with the structure shown in the formula (III), the norbornene diene and the second organic solvent to obtain the phenyl pyridine compound withthe structure represented by the formula (VI), wherein no noble metal catalyst is needed in the reaction, the reaction yield and purity are both high. Besides, the preparation method provided is concise in route, good in process controllability, low in cost and easy for industrial production.
