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.
pTSA-catalyzed one-pot synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in ionic liquid and neat conditions
作者:Jitender M. Khurana、Devanshi Magoo
DOI:10.1016/j.tetlet.2009.06.029
日期:2009.8
3-dicarbonyl compounds catalyzed by p-toluenesulfonic acid has been accomplished for the synthesis of a series of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in ionicliquid([bmim]BF4) and in solvent-free media. High yields, ease of recovery, and reusable reaction medium (ionicliquid) with consistent activity makes this protocol efficient and environmentally benign.
Green Approaches for the Synthesis of 12-Aryl-8,9,10,12-tetrahydrobenzo[<i>a</i>]xanthen-11-ones in Aqueous Media and Under Microwave Irradiation in Solventless Conditions
作者:Jitender M. Khurana、Anshika Lumb、Archana Pandey、Devanshi Magoo
DOI:10.1080/00397911.2010.544832
日期:2012.6.15
sulfuric acid. The condensation has also been achieved by irradiating the components in the presence of a catalytic amount of para-toluene sulfonic acid under neat conditions with microwaves. The green methodologies defined herein avoid the severe conditions posed by the older existing methods and prove to be efficient in terms of good yields, operational simplicity, easy workup, and short reaction time
Synthesis of novel 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthene-11-thiones and evaluation of their biocidal effects
作者:Jitender M. Khurana、Devanshi Magoo、Komal Aggarwal、Nisha Aggarwal、Rajesh Kumar、Chitra Srivastava
DOI:10.1016/j.ejmech.2012.10.025
日期:2012.12
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.