- A rapid and efficient method for the synthesis of 14H-dibenzo[7α.j] xanthenes, aryl-5H-dibenzo [b.i]xanthene-5,7,12,14-(13H)-tetraone and 1,8-dioxo-octahydroxanthenes by acidic ionic liquid
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Various xanthenes have been synthesized by the condensation of β-naphthol, 2-hydroxynaphthalene-1,4-dione or dimedone with various aldehydes in the presence of trifluoroacetic acid as catalyst in 1,1,3,3-N,N,N',N'-tetramethylguanidinium trifluoroacetate (
- Rahmati, Abbas
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- Solvent-free synthesis of 14-Aryl-14H-dibenzo[a,j]xanthenes catalyzed by recyclable and reusable iron(III) triflate
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A solvent-free and efficient synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes through the one-pot condensation of β-naphthol and aldehydes catalyzed by recyclable and reusable Iron(III) triflate was reported. Notably, the presented method features short rea
- Cao, Yang,Yao, Changsheng,Qin, Bingbin,Zhang, Honghong
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p. 3055 - 3062
(2013/09/23)
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- Br?nsted acidic ionic liquid as an efficient and reusable catalyst for synthesis of 14-aryl-or 14-alkyl-14 H-dibenzo[a,j]xanthenes under solvent-free conditions
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A mild and efficient method has been developed for the preparation of 14-aryl-or 14-alkyl-14H-dibenzo[a,j]xanthenes from one-pot condensation of aldehydes with 2-naphthol using catalytic amount of Br?nsted acidic ionic liquid ([TEBSA][HSO) under thermal s
- Hajipour, Abdol R.,Ghayeb, Yosof,Sheikhan, Nafisehsadat,Ruoho, Arnold E.
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experimental part
p. 741 - 744
(2010/06/13)
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- Fluoroboric acid adsorbed on silica-gel-catalyzed synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives
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A simple and efficient procedure has been developed for the preparation of 14-aryl-14H-dibenzo[a,j]xanthene derivatives using fluoroboric acid adsorbed on silica gel as a heterogeneous catalyst. The methodology involves the one-pot condensation reaction o
- Liu, Yu-Heng,Tao, Xu-Ye,Lei, Li-Qin,Zhang, Zhan-Hui
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experimental part
p. 580 - 589
(2009/07/04)
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- Facile and efficient synthesis of 14-alkyl- or aryl-14-H-dibenzo[a,j] xanthenes using sulfonyl-functionalized ionic liquids
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An efficient, simple, and rapid synthesis of 14-alkyl-or aryl-14-H-dibenzo[a,j]xanthenes is reported by one-pot condensation of 2-naphthol with alkyl or aryl aldehydes in the presence of sulfonyl- functionalized acidic ionic liquids at 125°C. Copyright Ta
- Kumari, Pratibha,Yathindranath, Vinith,Chauhan
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p. 637 - 648
(2008/04/12)
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