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.
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)]
4-Imidazol-1-yl-butane-1-sulfonic acid or a novel liquid salt? The NMR analysis and dual solvent-catalytic efficiency for one-pot synthesis of xanthenes
structure of the product was investigated by the NMRanalysis in CD3OD and DMSO‑d6. This work demonstrated that 4-imidazol-1-yl-butane-1-sulfonic acid could not be obtained through the above reaction and the mixture of zwitterionic (I) and ionic (II) structure is produced. The structure of the liquid salt (I + II) was characterized and analyzed by 2D NMR. Then, the dual solvent-catalytic efficiency of
A new strategy for the synthesis of benzoxanthenes catalyzed by proline triflate in water
作者:Jianjun Li、Lingmei Lu、Weike Su
DOI:10.1016/j.tetlet.2010.02.149
日期:2010.5
Catalyzed by proline triflate, benzoxanthenes were obtained in good yields from the condensation of naphthols, aldehydes, and 1,3-dicarbonyl compounds in water. A possible mechanism of this reaction is proposed.
Synthesis and characterization of novel binuclear task-specific ionic liquid: an efficient and sustainable sulfonic-functionalized ionic liquid for one-pot synthesis of xanthenes
作者:Nader Ghaffari Khaligh
DOI:10.1007/s11164-018-3354-8
日期:2018.7
A new binuclear sulfonic-functionalized ionicliquid was synthesized in two steps and its dual solvent-catalytic activity was studied for the synthesis of a variety of xanthenes under mild conditions. The simple experimental and sustainable procedure, good yield of the desired products within short reaction times, and recyclability of the ionicliquid are some advantages of the present strategy, and
An Organocatalyzed Expeditious Synthetic Route to Tetrahydrobenzo[a]xanthen-11-ones via Grinding Technique
作者:Pravin V. Shinde、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.2174/157017811797249308
日期:2011.10.1
In the present study, successful implementation of grinding technique and camphor sulphonic acid (CSA) as a catalyst, has been demonstrated for the rapid synthesis of 12-aryl-9,9-dimethyl-8,9,10,12-tetrahydrobenzo[a]xanthen-11- ones at ambient temperatures, avoiding excessive/wasteful heating.