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.