Journal of Saudi Chemical Society, 2017 A simple method for the synthesis of Tetrahydrobenzo[a]xanthenes-11-one derivatives in the presence of BF3.SiO2, and its antibacterial activity was assessed against Pseudomonas syringae, Xanthomonas citi and Pectobacterium carotovorum.
Ali Akbari
exaly +5 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 +3 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 +4 more sources
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
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 +3 more sources
Bulletin of the Chemical Society of Japan, 1984 Abstract The ozonation of xanthene was studied using an oxygen stream. Ozone attacks the methylene group of xanthene via a 1,3-dipolar insertion reaction to give the hydrotrioxide intermediate, followed by a loss of singlet oxygen to form xanthydrol.
Masaki Matsui +3 more
openaire +2 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
Asymmetric total synthesis of polycyclic xanthenes and discovery of a WalK activator active against MRSA [PDF]
Nature CommunicationsThe development of new antibiotics continues to pose challenges, particularly considering the growing threat of multidrug-resistant Staphylococcus aureus. Structurally diverse natural products provide a promising source of antibiotics. Herein, we outline
Min-Jing Cheng +12 more
doaj +2 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