Rhodium(III)-catalyzed regioselective C H nitrosation/annulation of unsymmetrical azobenzenes to synthesize benzotriazole N-oxides via a RhIII/RhIII redox-neutral pathway
Rhodium(III)-catalyzed regioselective C H nitrosation/annulation of unsymmetrical azobenzenes to synthesize benzotriazole N-oxides via a RhIII/RhIII redox-neutral pathway
Arenesulphinic acids. Nitroso protecting reagents applicable to some nitrosoarenes
作者:Andr� Darchen、Claude Moinet
DOI:10.1039/c3976000820a
日期:——
Arsenesulphinic acids were used, in acidic media, as protectingreagents for the C-nitroso-group against reduction and condensation, leading to a non-reducible hydroxylamine; deprotection is effected by basic hydrolysis.
Hydroxide-promoted redox reactions in water of α-Phenyl-4-nitro-benzenemethanol, α-(<i>p</i>-Nitrophenyl)-4-pyridinemethanol, and α-(<i>p</i>-Nitrophenyl)-4-Pyridinemethanol<i>N</i>-Oxide steric inhibition of resonance
作者:Chester W. Muth、Kaipeen E. Yang
DOI:10.1002/jhet.5570330206
日期:1996.3
amounts of 4-aminobenzophenone and 4-nitrobenzophenone. Both α-phenyl-2-nitrobenzenemethanol (9) and 3, 5-dimethyl-4-nitrobenzenemethanol (10a) did not react with 1 M sodium hydroxide, presumably due to steric hindrance. α-(p-Nitrophenyl)-4-pyridinemethanol (14) and its N-oxide 11 with 1 M sodium hydroxide yielded 4,4′-diaroylazoxybenzenes 15a and 12a, respectively, 4,4′-diaroylazobenzenes 15b and 12b, respectively
Simple Preparation of Nitroso Benzenes and Nitro Benzenes by Oxidation of Anilines with H<sub>2</sub>O<sub>2</sub>Catalysed with Molybdenum Salts
作者:Albert Defoin
DOI:10.1055/s-2004-815964
日期:——
Nitroso arenes 2a-k are prepared in 53-80% yield from anilines 1a-k by oxidation with H2O2 catalysed with MoO3/KOH, ammonium molybdate or other molybdenum salts. Further oxidation to nitro arenes 3a,d,j in 66-90% is also described.
Visible-light-promoted nitrone synthesis from nitrosoarenes under catalyst- and additive-free conditions
作者:Bao-Gui Cai、Lin Li、Guo-Yong Xu、Wen-Jing Xiao、Jun Xuan
DOI:10.1007/s43630-021-00062-6
日期:2021.6
A green and sustainable nitrone formation reaction via visible-light-promoted reaction of aryl diazoacetates with nitrosoarenes is described. This protocol exhibits good functional group tolerance and broad substrate scope for both aryl diazoacetates with nitrosoarenes. Comparing the reported methods for the synthesis of nitronesfrom nitrosoarenes, the reaction described herein occurs under sole visible-light