Results 91 to 100 of about 47,089 (385)
Supramolecular Chemistry in Metal–Organic Framework Materials
Advanced Materials, EarlyView.This review highlights synergies between reticular chemistry and supramolecular chemistry. The role of supramolecular interactions in determining framework…guest interactions and attempts to understand dynamic behavior in metal–organic frameworks (MOFs), particularly emphasizing the development of crystal sponges, studying reactions in frameworks and ...
Eugenia Miguel‐Casañ +3 more
wiley +1 more source
Molecules, 2019 A method for the HMPA (hexamethylphosphoric triamide)-catalyzed metal-free transfer hydrogenation of pyridines has been developed. The functional group tolerance of the existing reaction conditions provides easy access to various piperidines with ester ...
Yun Fu, Jian Sun
doaj +1 more source
Organophotocatalysed synthesis of 2-piperidinones in one step via [1 + 2 + 3] strategy
Nature Communications, 2023 Six-membered N-containing heterocycles, such as 2-piperidinone derivatives, with diverse substitution patterns are widespread in natural products, drug molecules and serve as key precursors for piperidines.
Yi-Dan Du +6 more
doaj +1 more source
Anodic benzylic C(sp3)–H amination: unified access to pyrrolidines and piperidines
, 2018 An electrochemical aliphatic C–H amination strategy was developed to access the important heterocyclic motifs of pyrrolidines and piperidines within a uniform reaction protocol. The mechanism of this unprecedented C–H amination strategy involves anodic C–
Sebastian Herold +2 more
semanticscholar +1 more source
De‐Saturation of Single‐Atom Copper Catalysts for Accelerating Propargylic Substitution Reactions
Advanced Materials, EarlyView.De‐saturation of copper‐based single‐atom catalysts (De‐sat SACs) are realized by a KOH‐mediated Joule thermal shock strategy. Benefiting from the under‐saturation coordination environment of single‐atom Cu center, De‐sat Cu SACs exhibit remarkable catalytic activity in propargylic substitution reactions, tolerating a broad range of nucleophiles (N–, C–
Qilong Cai +12 more
wiley +1 more source
Organic Letters, 2019 Mannich reactions of carbohydrate derivatives with ketones that afford polyoxy-functionalized piperidines are reported. Ketone nucleophiles (enamines/enolates) were generated in the presence of the amines used for the formation of the iminium ions of ...
Lingaiah Maram, F. Tanaka
semanticscholar +1 more source
Recent Advances in Ene Reactions with Carbon Enophiles
Advanced Synthesis &Catalysis, EarlyView.Recent advances in the classical intra‐ and intermolecular ene nexus with carbon enophiles (alkenes, alkynes, arynes, and allenes) show a considerable increase in structural complexity and an enormous potential for functional applications in polymer science.
Thomas J. J. Müller
wiley +1 more source
Synthesis and Evaluation of Novel Iminosugars Prepared from Natural Amino Acids
Molecules, 2021 Cyclopropanated iminosugars have a locked conformation that may enhance the inhibitory activity and selectivity against different glycosidases. We show the synthesis of new cyclopropane-containing piperidines bearing five stereogenic centers from natural
Alejandro Puet +3 more
doaj +1 more source
Ultrasound accelerated one-pot five component reaction: a facile access to functionalized piperidines [PDF]
, 2016 A one-pot five-component coupling of aryl aldehydes, aryl amines and β-keto ester affords functionalized piperidines I [R1 = C6H5, 4-FC6H4, 3,4,5-(OCH3)3C6H2; R2 = C6H5, 4-CH3C6H4; R3 = CH3, CH2CH3] under sonication (35 kHz) is developed ...
Pasha, M.A., Sudha, S.
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