By continuing you agree to the use of cookies. Nitrones are generated upon irradiation of imines in TiO2/acetonitrile under oxygenated conditions <1998TL3547>. It is likely that (94d) is the most important one in view of the exclusive generation of (92) in the reaction of (96; R″ = Me): transition states (94b) and (94c) clearly suffer from serious interactions involving R″. This practical method uses air as economic and green oxidant, water as green solvent, and tolerates a wide range of substrates. N-Benzyl acyclic nitrones may be conveniently prepared by zinc chloride-catalyzed condensation of benzylhydroxylamine with aliphatic ketones <1995SC2275>. One such example is given by the pyrolysis of acetone oxime (the simplest ketoxime), which takes place around 270°C and generates CH4, NH3, and other small molecules. A green synthesis of α,N-diarylnitrones, by grinding an aryl aldehyde and phenylhydroxylamine with clay, is reported <1997SC4041>. We use cookies to help provide and enhance our service and tailor content and ads. 94d) is probably much more stable. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. URL: https://www.sciencedirect.com/science/article/pii/B9780444640000000093, URL: https://www.sciencedirect.com/science/article/pii/B0080447058001928, URL: https://www.sciencedirect.com/science/article/pii/B978012372563950046X, URL: https://www.sciencedirect.com/science/article/pii/B0080446558000568, URL: https://www.sciencedirect.com/science/article/pii/B9780080523491000238, Pyrolysis of Other Nitrogen-Containing Compounds, Pyrolysis of Organic Molecules (Second Edition), Synthesis: Carbon with Two Attached Heteroatoms with at Least One Carbon-to-Heteroatom Multiple Link, Comprehensive Organic Functional Group Transformations, Bretherick's Handbook of Reactive Chemical Hazards (Seventh Edition), Synthesis: Carbon With One Heteroatom Attached by a Multiple Bond, Comprehensive Organic Functional Group Transformations II, α,β-Unsaturated nitrone precursors to a series of 1,2-oxazin-6-ones were prepared by the photooxygenation of 2-methoxyfurans in the presence of, Techniques and Instrumentation in Analytical Chemistry. p-Toluenesulfonic peracid (TsOOH) can also oxidize amines to the corresponding nitrones <1996T5773>. 2-Substituted-3H-indol-3-one-N-oxides can be obtained by the reductive cyclization of dione 10 (Equation (12)) <2001SL700>. Acetaldehyde oxime (acetaldoxime) generates by pyrolysis in the temperature range 330–440°C not only methylcyanide (ethanenitrile) and water but also forms some acetaldehyde, N2, etc..