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Nanoparticle‐Catalysed 1,3‐Dipolar Cycloadditions [PDF]
European Journal of Organic Chemistry, 2020 The 1,3-dipolar cycloadditions of azomethine-ylides and -imines, nitrones, nitrilimines, and azides catalysed by inorganic nanoparticles are described.
Giorgio Molteni, Alessandro Ponti
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Stereoselective Photoredox Catalyzed (3+3) Dipolar Cycloaddition of Nitrone with Aryl Cyclopropane
Angewandte Chemie, 2023AbstractBy resorting to the principle of remote activation, we herein demonstrate the first photoredox catalyzed (3+3) dipolar cycloaddition of nitrones with aryl cyclopropanes. Key to the fidelity of the reaction resides in a facile manner of substrate activation by single‐electron transfer (SET) oxidation with photoredox catalysis, and the reaction ...
Yao Xu +6 more
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New Parabanate Products by 1, 3-Dipolar Cycloaddition Reaction (‘Criss-Cross’ Cycloaddition)
High Performance Polymers, 1999New parabanate products containing 1, 3, 5, 7-tetraazabicyclo[3, 3, 0]octane-2, 6-dione are described. The synthesis of αω-diisocyanato-telechelics starting from two diisocyanates having a preformed parabanic unit using a [3+2] dipolar cycloaddition reaction was studied.
Adrian A Caraculacu +2 more
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ChemInform Abstract: [2 + 3]Dipolar Cycloadditions of a Monomeric Thioaldehyde.
Chemischer Informationsdienst, 1986AbstractThiopivalaldehyd (I) liefert mit den Nitronen (II) und (IV), dem Nitriloxid (VI), der Diazoverbindung (VIII) sowie dem Azomethinimin (X) die stabilen [2 + 3]‐Cycloaddukte (III), (V), (VII), (IX) und (XI).
E. VEDEJS, R. G. WILDE
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Captodative Alkenes in Concerted 1, 3-Dipolar Cycloadditions
1986The 1, 3-dipolar cycloaddition of an E-/Z-pair of captodative alkenes to a cyclic aldonitrone is demonstrated to occur stereospecifically. Additions of α-(tert-butylthio)acrylonitri le to a series of C, N-diphenylnitrones show a change in regioselectivity upon donor substitution in the C-phenyl-ring.
Dietrich Döpp +2 more
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Trimethylsilyl Triflate-promoted [2+3] Dipolar Cycloaddition of Nitrones with Allyltrimethylsilane
HETEROCYCLES, 19923-Alkyl-5-trimethylsilylmethylisoxazolidines are accessible in good yields and at temperatures ≤ 20°C, by the trimethylsilyl triflate-promoted reaction of allyltrimethylsilane with aliphatic nitrones.
Claudio Trombini, Dilip D. Dhavale
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1,3-Dipolar cycloadditions of MeOPEG-bounded azides
Tetrahedron, 2005 1,3-Dipolar cycloadditions of MeOPEG-supported azide 2 with a variety of dipolarophiles have been studied. 1-MeOPEGsupported 1,2,3-triazoles 4 and 5, 1,2,3,4-tetrazoles 12 and aziridine 14 were obtained in nearly quantitative yields. The removal of the
Giorgio Molteni, Paola del Buttero
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Chemistry – A European Journal, 2013
AbstractThe theoretical background of the formation of N‐heterocyclic oxadiazoline carbenes through a metal‐assisted [2+3]‐dipolar cycloaddition (CA) reaction of nitrones R1CHN(R2)O to isocyanides CNR and the decomposition of these carbenes to imines R1CHNR2 and isocyanates OCNR is discussed.
Alexander S, Novikov +2 more
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AbstractThe theoretical background of the formation of N‐heterocyclic oxadiazoline carbenes through a metal‐assisted [2+3]‐dipolar cycloaddition (CA) reaction of nitrones R1CHN(R2)O to isocyanides CNR and the decomposition of these carbenes to imines R1CHNR2 and isocyanates OCNR is discussed.
Alexander S, Novikov +2 more
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Advanced Synthesis and Catalysis, 2012 The first organocatalytic enantioselective protocol has been developed for the dipolar [3+2]?cycloaddition between acetylenic aldehydes and nitrones through an iminium activation pathway.
Xianrong Cai
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