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)]
Xanthenones: calixarenes-catalyzed syntheses, anticancer activity and QSAR studies
作者:Daniel Leite da Silva、Bruna Silva Terra、Mateus Ribeiro Lage、Ana Lúcia Tasca Góis Ruiz、Cameron Capeletti da Silva、João Ernesto de Carvalho、José Walkimar de Mesquita Carneiro、Felipe Terra Martins、Sergio Antonio Fernades、Ângelo de Fátima
DOI:10.1039/c4ob02611j
日期:——
An efficient method is proposed for obtaining tetrahydrobenzo[a]xanthene-11-ones and tetrahydro-[1,3]-dioxolo[4,5-b]xanthen-9-ones. The method is based on the use of p-sulfonic acid calix[n]arenes as catalystsundersolvent-freeconditions. The antiproliferative activity of fifty-nine xanthenones against six human cancer cells was studied. The capacity of all compounds to inhibit cancer cell growth
Sulfonation of carbonized xylan-type hemicellulose: a renewable and effective biomass-based biocatalyst for the synthesis of O- and N-heterocycles
作者:Jiliang Ma、Xinwen Peng、Linxin Zhong、Runcang Sun
DOI:10.1039/c8nj01329b
日期:——
application of biomass-based carbonaceous solidacids in catalysis is attracting increasing attention in the field of chemistry. In this study, a heterogeneous carbon-based solidacid biocatalyst (CXH-SO3H) with regular spherical structure was synthesized from xylan-type hemicellulose (XH) by a simple two-step method. The catalyst was successfully applied in the synthesis of O- and N-heterocycles with yields
Résumé Cerium(III) chloride is found to be an highly efficient catalyst for the addition of aldehydes, β-naphthol and cyclic 1,3-dicarbonyl compounds/Meldrum's acid via a multicomponent reaction. The easy availability of starting materials, novel and eco-friendly procedure makes this strategy more useful for the preparation of tetrahydrobenzo[a]-xanthen-11-one, and benzo[f]chromen-3-one derivatives.
A magnetic nanoparticle supported dual acidic ionic liquid: a “quasi-homogeneous” catalyst for the one-pot synthesis of benzoxanthenes
作者:Qiang Zhang、Hong Su、Jun Luo、Yunyang Wei
DOI:10.1039/c1gc16031a
日期:——
A novel magneticnanoparticle supported dual acidic ionic liquid catalyst was synthesized by anchoring 3-sulfobutyl-1-(3-propyltriethoxysilane) imidazolium hydrogen sulfate onto the surface of silica-coated Fe3O4 nanoparticles. Due to the combination of nano-support features and flexible imidazolium linkers, it acted as a “quasi-homogeneous” catalyst to effectively catalyze the one-pot synthesis of