- Visible Light-Promoted Recyclable Carbon Nitride-Catalyzed Dioxygenation of β,γ-Unsaturated Oximes
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A visible-light-induced dioxygenation of β,γ-unsaturated oximes for the synthesis of diverse useful isoxazolines bearing a hydroxyl moiety was developed by employing graphitic carbon nitride (g-C3N4) as a heterogeneous photocatalyst under an air atmosphere. Noted that, the eminent advantages of this metal-free protocol include step economy, easy operation, a recyclable photocatalyst, external reductant-/oxidant-free and mild reaction conditions. Additionally, mechanistic studies indicated hydroxyl radical was generated under the photocatalysis of g-C3N4.
- Fu, Xiao-Yang,Si, Ya-Feng,Qiao, Li-Peng,Zhao, Yu-Fen,Chen, Xiao-Lan,Yu, Bing
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p. 574 - 580
(2021/11/13)
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- Green organocatalytic synthesis of isoxazolines via a one-pot oxidation of allyloximes
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A green, sustainable, organocatalytic, and efficient synthesis of isoxazolines from allyloximes was developed. A 2,2,2-trifluoroacetophenone-catalyzed oxidation of allyloximes, utilizing H2O2 as the green oxidant, was taken advantage of in order to introduce a cheap and environmentally friendly protocol for the synthesis of substituted isoxazolines. A variety of substitution patterns, both aromatic and aliphatic moieties, are well tolerated, leading to isoxazolines in moderate to excellent yields.
- Triandafillidi, Ierasia,Kokotos, Christoforos G.
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p. 106 - 109
(2017/11/27)
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- Cyclohexylamine derivatives as subtype selective N-methyl-D-aspartate antagonists
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Described are cyclohexylamine derivatives of Formula I Formula VI andFormula VIa and pharmaceutically acceptable salts thereof, wherein R1, g, *, R, V, B, E, Y, G, H, X1, and d are as defined in the description. The compounds of Formulas I and VI are antagonists of NMDA receptor channel complexes useful for treating cerebral vascular disorders such as, for example, stroke, cerebral ischemia, trauma, hypoglycemia, anxiety, migraine headache, convulsions, Parkinson's disease, aminoglycoside antibiotics-induced hearing loss, psychosis, glaucoma, CMV retinitis, opioid tolerance or withdrawal, chronic pain, or urinary incontinence.
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- Synthesis of isoxazolines and isoxazoles using poly(ethylene glycol) as support
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A general method for the liquid-phase syntheses of isoxazoles and isoxazolines through a 1,3-dipolar cycloaddition is described. The poly(ethylene glycol) (PEG)-supported alkyne 2 or alkene 6 reacted with nitrile oxides generated in situ from aldoximes 3, followed by cleavage from the PEG, to give isoxazoles or isoxazolines in good yield and purity.
- Shang, Yong-Jia,Wang, Yan-Guang
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p. 1663 - 1668
(2007/10/03)
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