Results 71 to 80 of about 12,440 (225)
Acta Crystallographica Section E: Crystallographic Communications, 2016 In the title compound, C26H24O5, the pyran ring has a flattened-boat conformation, with the 1,4-related ether O and methine C atoms lying 0.1205 (18) and 0.271 (2) Å, respectively, above the least-squares plane involving the doubly bonded C atoms (r.m.s ...
Mukesh M. Jotani +5 more
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Fe3o4 nanoparticles: A highly efficient and easily reusable catalyst for the one-pot synthesis of xanthene derivatives under solvent-free conditions [PDF]
Journal of the Serbian Chemical Society, 2013 Magnetically separable Fe3O4 nanoparticles supply environmentally friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene and 1,8-dioxo-octahydro-xanthene derivatives.
Ghasemzadeh Ali Mohammad +2 more
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Dearomatization with Axial‐to‐Central Chirality Conversion
European Journal of Organic Chemistry, Volume 29, Issue 17, 5 May 2026.Atropisomers are exciting synthetic targets with unique properties, which find applications in many fields of chemistry. However, considering them as substrates is not very frequent, notably in the context of dearomatization reaction. We wish to discuss the different strategies for the dearomatization of aromatic atropisomers with axial‐to‐central ...
Morgane Mando +3 more
wiley +1 more source
Acta Chimica Slovenica, 2016 A general synthetic route to dibenzoxanthenes has been developed using 1,4-diazanium-bicyclo[2.2.2]octane diacetate as a new bis ionic liquid under thermal and solvent free condition.
Leila Zare Fekri, Hajar Saeedi Fard
doaj +1 more source
Synthesis and antitumour evaluation of benzopsoralen analogues [PDF]
, 2007 The synthesis of five new analogues of benzopsoralens, derived from xanthen-9-one and carbazole is described. The preparation of the hydroxylated precursors, their formylation and the formation of the pyranone ring, by the reaction between ortho ...
Beak +37 more
core +1 more source
Phloxine B Staining is Compatible With High‐Throughput DNA Barcoding of Meiofauna
Ecology and Evolution, Volume 16, Issue 5, May 2026.Modern, integrative biodiversity research requires methods capable of bridging the gap between detailed morphological observations and the scalability of DNA sequencing. For small, transparent, and highly abundant animals like meiofauna, sorting specimens from the matrix forms a major bottleneck, as the use of commonly used stains can inhibit ...
Romy Lisanne Gielings +3 more
wiley +1 more source
Functional aromatic polyamides [PDF]
, 2017 We describe herein the state of the art following the last 8 years of research into aromatic polyamides, wholly aromatic polyamides or aramids. These polymers belong to the family of high performance materials because of their exceptional thermal and ...
Cowie +6 more
core +1 more source
Modulation of Phenol Oxidation in Cofacial Dyads [PDF]
, 2015 The presentation of two phenols on a xanthene backbone is akin to the tyrosine dyad (Y[subscript 730] and Y[subscript 731]) of ribonucleotide reductase. X-ray crystallography reveals that the two phenol moieties are cofacially disposed at 4.35 Å.
Halbach, Robert L. +4 more
core +3 more sources
1-(3, 4-Dichlorobenzenesulfonyl)-3-Methyl-1H-Imidazolium Chloride: An Efficient Catalyst for the Synthesis of 1, 8-Dioxo-Octahydroxanthenes under Microwave Irradiation [PDF]
, 2014 The reaction of 5,5-dimethyl-1,3-cyclohexanedione with various aromatic aldehydes to give corresponding 1,8-dioxo-octahydroxanthenes in aqueous medium has been reported.
Kesturu Venkatarayappa Jagannath, . +1 more
core
2,2′-[(4-Butoxyphenyl)methylene]bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-one)
IUCrDataIn the title compound, C27H36O5, the dihedral angles between the planes of the benzene ring and the cyclohexenone rings are 60.87 (10) and 65.04 (10)°, while the dihedral angle between the mean planes of the two cyclohexenone rings is 39.33 (10)°.
N. Suresh Babu +4 more
doaj +1 more source