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Photoreduction synthesis of various azoxybenzenes by visible-light irradiation under continuous flow conditions

Photoreduction synthesis of various azoxybenzenes by visible-light irradiation under continuous... A variety of substituted azoxybenzenes can be obtained by simple photoreduction of the corresponding nitrobenzene using a flow microreactor. The yield and chemoselectivity of each azoxybenzene depends on the type and position of the substituents. In addition, the use of liquid-liquid slug flow conditions, consisting of an organic solution and a fluorous solvent like tetradecafluorohexane (TDFH) or octadecafluorooctane (ODFO), improves both the conversion and yield of this photoreduction compared to those in simple one-phase flow conditions; these results are due to synergy between the very smooth photoreduction process and the highly efficient mixing obtained under continuous-flow conditions.Graphical abstract[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Flow Chemistry Springer Journals

Photoreduction synthesis of various azoxybenzenes by visible-light irradiation under continuous flow conditions

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Publisher
Springer Journals
Copyright
Copyright © Akadémiai Kiadó 2021
ISSN
2062-249X
eISSN
2063-0212
DOI
10.1007/s41981-021-00190-1
Publisher site
See Article on Publisher Site

Abstract

A variety of substituted azoxybenzenes can be obtained by simple photoreduction of the corresponding nitrobenzene using a flow microreactor. The yield and chemoselectivity of each azoxybenzene depends on the type and position of the substituents. In addition, the use of liquid-liquid slug flow conditions, consisting of an organic solution and a fluorous solvent like tetradecafluorohexane (TDFH) or octadecafluorooctane (ODFO), improves both the conversion and yield of this photoreduction compared to those in simple one-phase flow conditions; these results are due to synergy between the very smooth photoreduction process and the highly efficient mixing obtained under continuous-flow conditions.Graphical abstract[graphic not available: see fulltext]

Journal

Journal of Flow ChemistrySpringer Journals

Published: Mar 1, 2022

Keywords: Azoxybenzene; Nitrobenzene; Photoreduction; Microreactor; Slug flow

References