Results 21 to 30 of about 115,311 (290)
Molecules, 2022 4-Acyl-1H-pyrrole-2,3-diones fused at [e]-side with a heterocyclic moiety are suitable platforms for the development of a hetero-Diels–Alder-reaction-based, diversity-oriented approaches to series of skeletally diverse heterocycles.
Ekaterina E. Khramtsova +3 more
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Synthetic Studies on Erythromycin Derivatives: Reactivity of the C12-21 Alkene
Molecules, 2006 The reactivity of the C12-21 alkene of some erythromycin A derivatives was studied. This double bond was easily oxidized to the corresponding epoxide with excellent stereoselectivity. A single crystal X-ray structure showed that the epoxide moiety was on
Wei-Min Chen
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Azomethine Ylides—Versatile Synthons for Pyrrolidinyl-Heterocyclic Compounds
Molecules, 2023 Azomethine ylides are nitrogen-based three-atom components commonly used in [3+2]-cycloaddition reactions with various unsaturated 2π-electron components.
Siva S. Panda +3 more
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Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition
Molecules, 2015 An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is ...
Wen-Chang Chen +8 more
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X=Y–ZH compounds as potential 1,3-dipoles. Part 64: Synthesis of highly substituted conformationally restricted and spiro nitropyrrolidines via Ag(I) catalysed azomethine ylide cycloadditions [PDF]
, 2008 1,3-Dipolar reactions of imines of both acyclic and cyclic α-amino esters with a range of nitroolefins using a combination of AgOAc or Ag2O with NEt3 are described.
Albert +51 more
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Acta Crystallographica Section E: Crystallographic Communications, 2017 The title complex, [PdCl2(C8H14N2O)2]·2H2O, was obtained by N–O bond cleavage of the oxadiazoline rings of the trans-[dichlorido-bis(2,5,5-trimethyl-5,6,7,7a-tetrahydropyrrolo[1,2-b][1,2,4]oxadiazole-N1)]palladium(II) complex.
Jamal Lasri +3 more
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Electrochemical Synthesis of Isoxazoles and Isoxazolines via Anodic Oxidation of Oximes
ChemElectroChem, 2023 Isoxazol(in)es are widely featured structural motifs in natural products, agrochemicals, and pharmaceuticals. The first intermolecular approach for a direct electrochemical synthesis from readily available aldoximes is reported.
Silja Hofmann +4 more
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Overview of 1,5-Selective Click Reaction of Azides with Alkynes or Their Synthetic Equivalents
Molecules, 2023 Nowadays, the click reaction of azides with alkynes has evolved rapidly and become one of the most efficient methods to synthesize 1,2,3-triazoles, which are an important class of N-containing heterocycles.
Yaqi Zhao +3 more
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Cycloadditions to 1,1‐Dicyclopropylethylene [PDF]
Angewandte Chemie International Edition in English, 1969 While the stabilization of cationic centers by alpha cyclopropyl groups has been verified in many instances [2,31, to the best of our knowledge nothing is known about the influenceof cyclopropyl groups, as substituents, on the reaction mechanism of multiple bonds. The α-cyclopropylcarbonium ions 141 that may be formed are capable of rearrangement, thus
Effenberger, Franz, Podszun, Wolfgang
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ReactionsThe cycloaddition reaction is one of the most common reactions in organic chemistry. It has been applied in various fields. Herein, we focus on the application of cycloaddition reactions in investigating biological molecules and materials using magnetic ...
Amarendra Nath Maity +2 more
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