Synthesis of novel 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthene-11-thiones and evaluation of their biocidal effects
摘要:
Novel 12-aryl-8,9,10,12-tetrahydrobenzolakanthene-11-thiones have been synthesized in high yields by treatment of the corresponding oxo analogs with Lawesson's reagent. The structure has been confirmed by X-ray analysis. The compounds were tested for in vitro antifungal activity against Rhizoctonia bataticola, Sclerotium rolfsii, Fusarium oxysporum and Alternaria porii. The compounds exhibited moderate to good activity against all pathogens. Insecticidal activity of these compounds against Spodoptera litura was observed to be comparable to commercial pyrethroid insecticide, cypermethrin. The urease inhibitory activity has also been studied. (C) 2012 Elsevier Masson SAS. All rights reserved.
DOI:
10.1016/j.ejmech.2012.10.025
作为产物:
描述:
间溴苯甲醛 、 5,5-二甲基-1,3-环己二酮 、 2-萘酚 在
Sb(V) functionalized cellulose on Fe3O4 core of a core-shell nanoparticles 作用下,
以
neat (no solvent) 为溶剂,
反应 0.33h,
以95%的产率得到12-(3-bromophenyl)-9,9-dimethyl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one
simple, efficient, and environmentally benign route was developed for the preparation of 14-aryl or alkyl-14H-dibenzo[a,j]xanthene, 1,8-dioxo-octahydroxanthene and 12-aryl—8,9,10,12-tetrahydrobenzo[a]xanthene-11-ones from condensation of various aldehydes with (i) β-naphthol, (ii) cyclic 1,3-dicarbonyl compounds and (iii) β-naphthol and cyclic 1,3-dicarbonyl compounds, using novel polymeric catalyst [poly(AMPS-co-AA)]
Rapid, efficient and solvent-free synthesis of (un)symmetrical xanthenes catalyzed by recyclable sulfated polyborate
作者:Manisha S. Patil、Amey V. Palav、Chetan K. Khatri、Ganesh U. Chaturbhuj
DOI:10.1016/j.tetlet.2017.06.027
日期:2017.7
straightforward approach to the synthesis of 1,8-dioxo-octahydroxanthenes, 14-phenyl-14H-dibenzo[a,j]xanthene and tetrahydrobenzoxanthene-11-ones under solvent-free conditions usingsulfated polyborate as a highly efficientcatalyst. The procedure offers several advantages including cleaner reaction profile, mild reaction condition, economic, recyclable and environmentally benign catalyst, high yields, simple
Green multi-component domino reactions (MCRs)1–7 for the synthesis of fine chemicals have attracted much recent interest.8–9 Quinolines, spiro[4H-pyran-oxindoles] and xanthenes are reported as havi...
O-Sulfonated poly(4-vinylpyrrolidonium) chloride is prepared from the reaction of poly(4-vinylpyrrolidone) [PVP], as a cheap and commercially available reagent, and neat chlorosulfonic acid at room temperature. A variety of techniques including infrared spectra (IR), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), pH analysis and Hammett acidity (Ho) were used to characterize this solid acid. This polymeric reagent showed excellent catalytic activity for the synthesis of xanthene derivatives including 1,8-dioxooctahydroxanthenes, 14-aryl-14H-dibenzo[a,j] xanthenes and 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones under solvent free conditions. The products were formed in excellent yields over short reaction times and the catalyst can be reused several times without any appreciable loss in its activity.
Introduction of a new bi-SO<sub>3</sub>H ionic liquid based on 2,2′-bipyridine as a novel catalyst for the synthesis of various xanthene derivatives
作者:Farhad Shirini、Masoumeh Abedini、Mohaddeseh Seddighi、Omid Goli Jolodar、Mohadeseh Safarpoor、Nikoo Langroodi、Solmaz Zamani
DOI:10.1039/c4ra12361a
日期:——
1′-disulfo-[2,2′-bipyridine]-1,1′-diium chloride, [BiPy](SO3H)2Cl2 as a new ionic liquid, is prepared, characterized and used as an efficient catalyst for the promotion of the synthesis of various symmetric and asymmetric xanthene derivatives under solvent free conditions. All products were formed in excellent yields over short reaction times. Easy preparation of the catalyst, simple and easy work-up, mild