ZnNb₂O₆ fibre surface as an efficiently product-selective controller for the near-UV-light-induced nitrobenzene reduction reaction

Abstract

A high aniline yield was achieved by the combination of near-UV light as the driving force of nitrobenzene reduction and ZnNb2O6 surface as the product-selective controller.

Hydroxyl-group-modified polymeric carbon nitride with the highly selective hydrogenation of nitrobenzene to N-phenylhydroxylamine under visible light

“…1 It was well known that the reduction of nitrobenzene (NB) underwent complex reduction processes. 2,3 The side reactions such as the generation of coupling product and the over reduction to aniline (ANL) made it difficult to realize the high selectivity toward PHA (Scheme 1). [4][5][6][7] PHA was usually acquired via chemical reduction of NB by stoichiometric zinc powder, which resulted in the discharging of metal wastes and environment disruption.…”

Visible‐Light Catalyzed [1+2+2] Cycloaddition Reactions Enabled by the Formation of Methylene Nitrones

“…The reaction proceeded poorly in other solvents and DCM remained to be the optimal choice (entries 2, 6-11). In addition, several additives were screened and failed to improve the yield (entries [12][13][14][15]. The yield of 4 a could be readily improved to 70% by increasing the reaction time to 60 h (entries [16][17][18].…”

“…[11] Although the photocatalytic reduction of nitroarenes into the corresponding anilines have been realized, the controllable reduction towards nitrosoarenes or N-arylhydroxylamines and their subsequent transformations remain a challenge (Scheme 2D). [12] On the basis of the redox properties of the tertiary amines and nitroarenes, we envisioned that nitrones could be accessed through the condensation of in situgenerated iminium ions and N-arylhydroxylamines from tertiary amines and nitroarenes under visible light photocatalysis, thus avoiding the need to use stoichiometric amounts of oxidants or reductants common in conventional approaches (Scheme 2E). Herein, we report the first redox-neutral visible-light photocatalytic reactions of nitroarenes and N,N-dimethylanilines (or N-aryl glycines) for the synthesis of highly reactive methylene nitrone intermediates, which are trapped by alkenes to afford a variety of useful isoxazolidines.…”

Ultra-small FeS2 nanoparticles for highly efficient chemoselective transfer hydrogenation of nitroarenes

“…[16][17][18][19] Transfer hydrogenation is being investigated as an alternative approach to the use of high pressure molecular hydrogen in hydrogenation reactions. [20,21] Transfer hydrogenation reactions involve the use of a chemical substance that acts as hydrogen donor, such as NaBH 4 , alcohols, 1,2,3,4-tetrahydronaphthalene and many others. [20,22,23] Hydrazine monohydrate (N 2 H 4 .H 2 O) has been reported to be a potent reducing agent in hydrogen transfer for the reduction of nitroarenes to anilines.…”

“…[20,21] Transfer hydrogenation reactions involve the use of a chemical substance that acts as hydrogen donor, such as NaBH 4 , alcohols, 1,2,3,4-tetrahydronaphthalene and many others. [20,22,23] Hydrazine monohydrate (N 2 H 4 .H 2 O) has been reported to be a potent reducing agent in hydrogen transfer for the reduction of nitroarenes to anilines. [13,14] J. Wang et.…”