Quantitative photooxidation of 4-hydroxy-3-pyrazolinylcoumarins to pyrazolyl derivatives

Traven, V. F.; Иванов, И. В.; Pavlov, Aleksandr S.; Manaev, Aleksandr V.; Voevodina, I. V.; Barachevskii, V. A.

doi:10.1016/j.mencom.2007.11.016

Cited by 15 publications

(8 citation statements)

References 7 publications

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“…16 It turned out that the photoaromatization of compound 1а is not a single example of this kind. We photooxidized pyrazolines 1-4 containing various sub stituents in positions 1, 3, and 5 of the pyrazoline ring.…”

Section: Resultsmentioning

confidence: 99%

New reaction of photoaromatization of aryl- and hetarylpyrazolines

Traven

Иванов

2008

Russ Chem Bull

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Aryl and hetarylpyrazolines smoothly undergo photoaromatization under irradiation with the visible light (λ > 400 nm) in the presence of carbon tetrachloride. The reaction is accompa nied by an increase in the acidity of the medium and a change in the fluorescence. The structure of pyrazoline and solvent considerably affect the photoaromatization rate. The mecha nism of the reaction was proposed, which agrees with the experimental data.

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Section: Resultsmentioning

confidence: 99%

New reaction of photoaromatization of aryl- and hetarylpyrazolines

Traven

Иванов

2008

Russ Chem Bull

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“…Previously, we reported the photodehydrogenation of aryl (hetaryl)pyrazolines (1) under irradiation in the presence of carbon tetrachloride [27,28]. The following scheme of the aryl(hetaryl) pyrazolines transformation has been proposed (Scheme 1) [28].…”

Section: Resultsmentioning

confidence: 99%

Aryl(hetaryl)pyrazolines as new photoacid generators for optical information recording

Traven

Иванов

Dolotov

et al. 2014

Journal of Photochemistry and Photobiology A: Chemistry

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“…Experimental 1 H NMR spectra were recorded on a Bruker WP 200 SY spectrometer (200 MHz) in DMSO d 6 and CDCl 3 with Me 4 Si as the internal standard. Mass spectra were measured on a Finnigan MAT SSQ 710 mass spectrometer (EI, 70 eV).…”

Section: Methodsmentioning

confidence: 99%

“…At the same time, such compounds are of interest because of intense fluorescence of many hydroxy and amino coumarins. 5, 6 Earlier, we have studied condensation reac tions of 2,3 dihydrofuro[3,2 c]coumarin 3 one (1) 7 with aromatic aldehydes 8 and found that the condensation products exhibit pronounced fluorescence.…”

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confidence: 99%

Reactions of 2,3-dihydrofuro[3,2-c]coumarin-3-one with aromatic amines

et al. 2009

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2,3 Dihydrofuro[3,2 c]coumarin 3 one reacts with aromatic amines in two pathways, depending on the solvent. The reactions in ethanol afford its enamines, while the use of acetic acid favors the formation of enamines of the 2,3 dihydrofuro[3,2 c]coumarin 3 one dimer. Electronic absorption spectroscopy in different solvents revealed that the enamines obtained can undergo tautomeric transformations. The product of a reaction of 2,3 dihydrofuro [3,2 c]coumarin 3 one with 4 bromoaniline exists in the enamine form (X ray diffraction data).

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Quantitative photooxidation of 4-hydroxy-3-pyrazolinylcoumarins to pyrazolyl derivatives

Cited by 15 publications

References 7 publications

New reaction of photoaromatization of aryl- and hetarylpyrazolines

New reaction of photoaromatization of aryl- and hetarylpyrazolines

Aryl(hetaryl)pyrazolines as new photoacid generators for optical information recording

Reactions of 2,3-dihydrofuro[3,2-c]coumarin-3-one with aromatic amines

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