Efficient Photooxidation of Aryl(hetaryl)pyrazolines by Benzoquinone.

Autor: Traven VF; D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia., Ivanov IV; D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia., Dolotov SM; D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia., Semakin AN; D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia., Cheptsov DA; D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia., Mamirgova ZZ; D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia.
Jazyk: angličtina
Zdroj: Photochemistry and photobiology [Photochem Photobiol] 2019 Jul; Vol. 95 (4), pp. 924-930. Date of Electronic Publication: 2019 Feb 25.
DOI: 10.1111/php.13082
Abstrakt: Photooxidation of aryl(hetaryl)pyrazolines in the presence of benzoquinone has been studied in organic solvents. This reaction occurs at high rate to provide the corresponding pyrazole in a good yield. The effects of the solvent, pyrazoline structure and oxygen provide definite information on the reaction pathway. It appears that radical species are intermediates in the photooxidation of aryl(hetaryl)pyrazolines in the presence of benzoquinone. A comparison of the new results with the photooxidation of aryl(hetaryl)pyrazolines in the presence of perchloroalkanes is also discussed.
(© 2019 American Society for Photobiology.)
Databáze: MEDLINE
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