Tuning Benzylic C−H Functionalization of (Thio)xanthenes with Electrochemistry [PDF]
Molecules, 2023 Here, we report a tunable electrochemical benzylic C−H functionalization of (thio)xanthenes with terminal alkynes and nitriles in the absence of any catalyst or external chemical oxidant.
Changji Wang +4 more
exaly +4 more sources
Pharmaceuticals, 2022 Nowadays, leishmaniasis constitutes a public health issue in more than 88 countries, affecting mainly people from the tropics, subtropics, and the Mediterranean area. Every year, the prevalence of this infectious disease increases, with the appearance of
CARLOS Fábio Magalhães da Silva +2 more
exaly +3 more sources
Ultrasound-assisted green synthesis of functionalised xanthene derivatives: Advancing sustainable sonochemical strategies [PDF]
Ultrasonics SonochemistryXanthenes are an important class of heterocycles in medicinal chemistry due to their diverse pharmacological properties. These tricyclic aromatic compounds, characterised by a dibenzo[b,e]pyran core with an oxygen atom at their central position, have ...
Sasadhar Majhi +2 more
doaj +2 more sources
Electrochemical Site-Selective Alkylation of Azobenzenes with (Thio)Xanthenes
Molecules, 2022 Herein, we first report an electrochemical methodology for the site-selective alkylation of azobenzenes with (thio)xanthenes in the absence of any transition metal catalyst or external oxidant. A variety of groups are compatible with this electrochemical
Pei-Long Wang, Tao Miao
exaly +3 more sources
Synthesis and structure of 3-(14H-dibenzo[a,j]xanthen-14-yl)phenyl nicotinate [PDF]
Acta Crystallographica Section E: Crystallographic CommunicationsIn the title compound, C33H21NO3, the dihedral angle between the naphthalene units is 10.85 (4)° and the pyran ring adopts a shallow boat conformation. In the crystal, C—H...N and C—H...O hydrogen bonds link the molecules, enclosing R22(16) ring motifs ...
Ekaterina A. Akishina +6 more
doaj +2 more sources
Sulfonated Schiff base immobilized on magnetite-chitosan as an efficient nanocatalyst for the synthesis of xanthene derivatives [PDF]
Scientific ReportsThe present study aims to develop and enhance a magnetic heterogeneous catalyst with a core-shell structure, Fe3O4@CS/SSB (Fe3O4@Chitosan-Salicylaldehyde-5-sulfonate), by immobilizing a chitosan-based Schiff base complex on the surface of magnetite ...
Mohammadhossein Alijafari Taheri +2 more
doaj +2 more sources
Streamlining efficient and selective synthesis of benzoxanthenones and xanthenes with dual catalysts on a single support [PDF]
Scientific Reports, 2023 Using two catalysts on a single support can improve reaction efficiency, higher yields, improved selectivity, and simplified reaction conditions, making it a valuable approach for industrial transformation.
Najmedin Azizi +2 more
doaj +2 more sources
Molecules, 2020 In attempt to broaden the use of cyclodextrin polymer for catalytic purposes, a novel covalent hybrid system was prepared through growth of multi-nitrogen atom containing polymer (PMelamine) derived from reaction of ethylenediamine and 2,4,6-trichloro-1 ...
Masoumeh Dorraj +2 more
exaly +3 more sources
Antimicrobial and Antiproliferative Activities and Enzyme Binding Affinity of Xanthen-3-one Derivatives [PDF]
Kemija u Industriji, 2022 Ten biologically active derivatives of 2,6,7-trihydroxyxanthen-3-one, previously synthesized and characterised, were investigated for their in vitro antimicrobial and antiproliferative activity.
Elma Veljović +8 more
doaj +1 more source
Phosphosulfonic acid, an efficient solid acid catalyst for the one-pot preparation of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes under solvent-free conditions [PDF]
Journal of the Serbian Chemical Society, 2013 An expeditious procedure for the synthesis of 14- aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes through one-pot pseudo three component condensation of β-naphthol or dimedone with various aryl aldehydes is described.
Kiasat Reza Ali +2 more
doaj +1 more source