Results 21 to 30 of about 4,123 (167)
Angewandte Chemie, EarlyView.Here we report two nonalternant polycyclic aromatic hydrocarbons (PAH) (1 and 2), which contain two and four consecutive pentagons, respectively. Under acidic conditions, 1 and 2 dimerize to afford the axially chiral dimers AC1 and AC2. The central azulene moiety in both 2 and AC2 shows an unusually short transannular bond of 1.366 Å.
Chang Wang +3 more
wiley +2 more sources
Crystal structure of 1-iodo-3-{[4-(tert-butylsulfanyl)phenyl]ethynyl}azulene
Acta Crystallographica Section E: Crystallographic Communications, 2015 The title compound, C20H19IS, features a 1,3-disubstituted azulene involving an ethynylene elongated 4-(tert-butylsulfanyl)phenyl sidearm and an iodine atom as the substituents. The azulene ring system is almost planar (r.m.s.
Sebastian Förster +2 more
doaj +1 more source
First synthesis of 1-(indo1-2-yl)azulenes by the Vilsmeier-Haack type arylation with triflic anhydride as an activating reagent [PDF]
, 2012 Azulene derivatives reacted with 2-indolinones in the presence of triflic anhydride (Tf2O) to afford 1-(indo1-2-yl)azulenes in good yields. In the cases of the reaction of 6-tert-butyl-1-(methylthio)azulene (11) and 1-(1,4-dihydropyridin-4-yl)azulene 14,
Ito, Shunji, Inoue, Yuta, Shoji, Taku
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, 2022 It seems interesting to adopt the idea of dance in the context of the arrangement of molecular blocks in the building of molecular systems. Just as various dances can create various feelings, the nature and arrangement of molecular blocks in the ...
Alexandru C. Razus
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Cycloadditions to the Azulene System [PDF]
, 1970 Cycloadditions to the azulene system have not hitherto been observed. Instead, azulene reacts, e.g., with maleic anhydride via an "addition-substitution route" to give 1-azulenylsuccinic anhydride and with tetracyanoethylene to yield 1-tricy ...
Häring, J., Hafner, Klaus, Jäkel, W.
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A Thermochemical Computational Study on Hydroxyquinolines and their Azulene Analogues [PDF]
, 2018 Ab initio CBS-QB3 method has been used to determine gas-phase enthalpies of formation for 34 compounds including a number of hydroxyquinoline isomers, the corresponding azulene analogues and their parent systems.
Ahmed, El-Nahas +2 more
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Synthesis and Characterization of Quinoxaline-Fused Cyclopenta[cd]azulene
ChemistryAzulene-based polycyclic hydrocarbons have garnered much attention as potential materials for organic optoelectronic devices and as molecular models for graphene nanosheets with structural defects.
Tomohiro Oda +3 more
doaj +1 more source
Synthesis of 2-Azulenyl-1,1,4,4-tetracyano-3-ferrocenyl-1,3-butadienes by [2+2] Cycloaddition of (Ferrocenylethynyl)azulenes with Tetracyanoethylene [PDF]
, 2013 1-, 2-, and 6-(Ferrocenylethynyl)azulene derivatives 1016 have been prepared by palladium-catalyzed alkynylation of ethynylferrocene with the corresponding haloazulenes under SonogashiraHagihara conditions. Compounds 1016 reacted with tetracyanoethylene (
Shoji, Taku +3 more
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MoleculesThe scientific article focuses on the role of azulene and its derivatives in the therapy of dermatological diseases, presenting the latest laboratory and clinical research as well as prospects for further studies.
Emilia Slon +2 more
doaj +1 more source
, 2023 In the present study, we report a procedure of liquid-phase exfoliation (LPE) of pristine graphite in chloroform using azulene-based copolymers. The resulting dispersions were prepared using tip sonication for only 2 h and were stable over months ...
Mario Leclerc (59038) +4 more
core +1 more source