Results 41 to 50 of about 5,075 (257)

Intermolecular Anodic Oxidative Cross-Dehydrogenative C(sp³)–N Bond-Coupling Reactions of Xanthenes with Azoles

, 2019
A new anode strategy for accessing xanthen-9-azoles via an electrochemical C­(sp3)–H/N–H cross-coupling of xanthenes with azoles is described. This reaction proceeds efficiently with a broad scope of both xanthenes and N–H-free azoles under metal- and ...
Yong-Zheng Yang, Ren-Jie Song, Yong-Zheng Yang (6611729), Jin-Heng Li, Jin-Heng Li (1457626), Ren-Jie Song (1457623)   +5 more
core   +1 more source

Binuclear platinum complexes of 4,5-disubstituted xanthenes

, 2005
New binucleating ligands based on 4,5-disubstituted xanthenes have been prepared. The ligands, which display either mono- (acyl, nitrile) or bi-dentate (diimino, dithioamide) functionalities, can be prepared through simple procedures from commercial ...
ORABONA, IDA, RUFFO, FRANCESCO, GIORDANO, FEDERICO, PANUNZI, ACHILLE   +3 more
core   +1 more source

Optical Spectral Study of Rhodamine Dyes Mixture Solution in Chloroform [PDF]

Engineering and Technology Journal, 2013
The spectral properties (absorption and fluorescence) of laser dyes (Rhodamine6G, Rhodamine 3GO and Rhodamine B) mixture have been studied. This type of laser dye belongs to the Xanthenes family, it has dissolved in chloroform to prepare (1*10-5 M) in ...
Slafa Ismael Ibrahim, Majid Hameed Abdulmajeed   +1 more
doaj   +1 more source

Spirolactones of xanthene. IV New method of xanthone synthesis by oxidation of novel spirolactones of dibenzo[c,h]xanthene and xanthenes.

Chemical and Pharmaceutical Bulletin, 1987
Dibenzo [c, h] xanthone and halogen-and methyl-substituted xanthones have been synthesized by the oxidation of novel spirolactones of dibenzo [c, h] xanthene and xanthene, which were prepared by a new condensation reaction of 1-naphthol or phenol derivatives with oxalic acid in the presence of sulfuric acid.
KIMURA, MICHIO, OKABAYASHI, ICHIZO
openaire   +2 more sources

Simultaneous Wastewater‐to‐Hydrogen Upgrading via Mechanically Driven Piezocatalysis Over Ag‐ZnO Nanorods

Advanced Science, EarlyView.
A piezocatalytic strategy enables simultaneous wastewater purification and hydrogen generation by harnessing mechanical energy. Complementary piezo‐induced charges are selectively directed toward oxidation and reduction pathways, achieving efficient pollutant degradation and continuous H2 evolution.
Yiqing Wei, Jianghai Huang, Yejunchi Zhang, Yang Wang, Dongmei Li, Chaogang Ban, Peng Yu, Jiangping Ma, Zhenxiang Cheng   +8 more
wiley   +1 more source

Green Synthesis of Polysubstituted Quinolines and Xanthene Derivatives Promoted by Tartaric Acid as a Naturally Green Catalyst under Solvent-free Conditions

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2018
This method reported the use of tartaric acid as a green and highly efficient catalyst for the convenient synthesis of polysubstituted quinolines and xanthenes derivatives in excellent yields under solvent-free conditions. The main advantages of this one-
Farzaneh Mohamadpour, Malek Taher Maghsoodlou, Mojtaba Lashkari, Reza Heydari, Nourallah Hazeri   +4 more
doaj   +1 more source

Nano-TiCl4.SiO2: A Versatile and Efficient Catalyst for Synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes [PDF]

Journal of Nanostructures, 2013
Nano-silica supported titanium tetrachloride (TiCl4.SiO2) was prepared and used as an acid catalyst for the 14-aryl or alkyl-14H-dibenzo[a,,j]xanthenesreaction under solvent-free conditions.
B. F. Mirjalili, A. Bamoniri, L. Zamani
doaj   +1 more source

Nano-Fe3O4 encapsulated-silica particles bearing sulfonic acid groups as an efficient, eco-friendly and magnetically recoverable catalyst for synthesis of various xanthene derivatives under solvent-free conditions

Journal of Saudi Chemical Society, 2017
This report describes an efficient method for the synthesis of 1,8-dioxo-octahydroxanthene, 14H-dibenzo[a,j]xanthene, 12-aryl-tetrahydrobenzo[a]xanthenes-11-one and 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraone derivatives in the presence of a ...
Firouzeh Nemati, Samane Sabaqian
doaj   +1 more source

Multicomponent synthesis of novel azo-linked 9-Aryl-1H-xanthene-1,8(2H)-diones using ionic liquid [BDBDMIm]HSO4 [PDF]

شیمی کاربردی روز, 2019
The synthesis of ten novel azo dyes derived from 9-Aryl-1H-xanthene-1,8(2H)-dione derivatives from one equivalent of azo-linked salicylaldehydes and two equivalent of dimedone in the presence of 3,3'-(butane-1,4-diyl)bis(1,2-dimethyl-1H-imidazol-3-ium ...
mohammad nikpassand, leila Zare Fekri
doaj   +1 more source

Separation of Polyamide 66 From Blends With Wool Through Selective Dissolution: Implications of the Presence of Dyes

Journal of Applied Polymer Science, EarlyView.
The study assesses dye impacts on PA66/wool recycling via selective PA66 dissolution in calcium chloride–ethanol–water and water reprecipitation. Acid dyes migrate into solvent, yielding color‐free, melt‐spinnable PA66 and reusable wool. Metal‐complex dyes remain, altering PA66 melt viscosity and requiring extraction or repurposing.
Lukas Vonbrül, Doris E. Braun, Barbara M. Paul, Amalid Mahmud‐Ali, Sandra Eberle, Michael Cordin, Thomas Bechtold, Tung Pham, Avinash P. Manian   +8 more
wiley   +1 more source