Results 41 to 50 of about 4,376 (210)
Molecules, 2007 A series of novel benzimidazole derivatives 3-10 were synthesized. Benzimidazolyl-substituted acrylonitriles 3 and 4 underwent a photochemical dehydrocyclization reaction to give the corresponding mono- and dicyano-substituted benzimidazo[1,2-a ...
Marijana Hranjec, Grace Karminski-Zamola
doaj +1 more source
Cyclic amidines as precursors for imidazoles
ARKIVOC, 2015 The regioselective nucleophilic reactivity of cyclic amidines is considered in the context of their reactions with 2-haloketones to generate imidazoles. Since the tautomer with an endocyclic imine is favoured, reaction with the 2-haloketone electrophile ...
Marc Y. Stevens +5 more
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Continuous-Flow Synthesis of Thioureas, Enabled by Aqueous Polysulfide Solution
Molecules, 2021 We have developed the continuous-flow synthesis of thioureas in a multicomponent reaction starting from isocyanides, amidines, or amines and sulfur. The aqueous polysulfide solution enabled the application of sulfur under homogeneous and mild conditions.
András Gy. Németh +5 more
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Self‐Assembly of a Colloidal Honeycomb Crystal in Silico for Topological Valley Photonics
Small, EarlyView.The self‐assembly of a colloidal honeycomb crystal is demonstrated in computer simulations, using an assembly strategy that not only suppresses the formation of real‐space topological defects observed experimentally but also yields topological photonic properties in reciprocal space.
Adam Walker +5 more
wiley +1 more source
Stereodefined synthesis of cyclic amidines by domino 1,7-H shift and 6π electrocyclisation [PDF]
, 2023 Unsaturated N2-sulfonyl amidines are transformed into valuable N-heterocyclic products when heated with BF2OTf. Mechanism studies suggest a domino 1,7-H shift, activating a C–H bond, followed by electrocylisation that results in stereodefined cyclic ...
Boyer, Alistair +2 more
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Regiochemistry of cyclocondensation reactions in the synthesis of polyazaheterocycles
Beilstein Journal of Organic Chemistry, 2017 The syntheses of several polyazaheterocycles are demonstrated. The cyclocondensation reactions between β-enaminodiketones [CCl3C(O)C(=CNMe2)C(O)-CO2Et] and aromatic amidines resulted in glyoxalate-substituted pyrido[1,2-a]pyrimidinone, thiazolo[3,2-a ...
Patrick T. Campos +10 more
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(E)-N-[Cyclopentyl(morpholin-4-yl)methylidene]-4-fluorobenzenesulfonamide
IUCrData, 2016 The title compound, C16H21FN2O3S, was obtained from the reaction between sulfonyl azide, cyclohexanone and morpholine. The bond lengths at the amidine N—C—N grouping are similar [1.326 (3) and 1.338 (3) Å], indicating significant conjugation.
Ilya Efimov +3 more
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ChemistryOpen, Volume 15, Issue 11, November 2026.A zinc single‐atom catalyst anchored on nitrogen‐doped mesoporous carbon (Zn@NMC) was synthesized via an evaporation‐induced self‐assembly method and applied in the one‐pot synthesis of 2,4(5)‐diarylimidazoles. The catalyst was fully characterized using FT‐IR, XRD, SEM, EDX, BET, and TGA analyses.
Maryam Shojaei‐Asl, Mohsen Moradian
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Copper-catalyzed aerobic [3+2] : annulation of N-alkenyl amidines
, 2012 A method for the synthesis of bi- and tricyclic amidines has been developed through copper-catalyzed aerobic [3+2]-annulation reaction of N-alkenyl amidines.
Zhu, Xu, Wang, Yi-Feng, Chiba, Shunsuke
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Synthesis and Polymerization of a Lactone Building Block Derived From Cashew Nut Shells
ChemSusChem, Volume 19, Issue 19, 14 October 2026.Cardanol as a renewable substituted phenol feedstock was selectively transformed into the corresponding cyclohexanone derivative by means of a partial metal‐catalyzed hydrogenation. Subsequent conversion via Baeyer–Villiger oxidation gave a lactone product consisting of a mixture of regioisomers, which has been readily converted into its homopolymer ...
Paulo R. Wohlfahrt +6 more
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