1038917-60-0Relevant articles and documents
Graphene Oxide Incorporated Strontium Nanoparticles as a Highly Efficient and Green Acid Catalyst for One-Pot Synthesis of Tetramethyl-9-aryl-hexahydroxanthenes and 13-Aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones Under Solvent-Free Conditions
Mousavi, Seyyed Rasul,Rashidi Nodeh, Hamid,Zamiri Afshari, Elham,Foroumadi, Alireza
, p. 1075 - 1086 (2019)
An efficient, inexpensive and recyclable graphene oxide/strontium nanocatalyst was synthesized and applied in a pseudo three-component, one-pot cyclocondensation of aromatic aldehydes and dimedone/lowson to afford the corresponding 3,3,6,6-tetramethyl-9-a
Immobilized copper-layered nickel ferrite on acid-activated montmorillonite, [(NiFe2O4?Cu)(H+-Mont)], as a superior magnetic nanocatalyst for the green synthesis of xanthene derivatives
Zeynizadeh, Behzad,Rahmani, Soleiman
, p. 28038 - 28052 (2019/09/30)
In this study, the immobilization of copper-layered nickel ferrite on the surface and in the cavities of acid-activated montmorillonite (H+-Mont) was investigated. In this context, magnetic nanoparticles (MNPs) of NiFe2O4
Catalytic application of a nano-molten salt catalyst in the synthesis of biological naphthoquinone-based compounds
Yarie, Meysam,Zolfigol, Mohammad Ali,Babaee, Saeed,Baghery, Saeed,Alonso, Diego A.,Khoshnood, Abbas
, p. 2839 - 2852 (2018/01/27)
In this investigation, a new application of 1H-imidazol-3-ium tricyanomethanide catalyst was explored. The catalyst presented a robust catalytic applicability for the preparation of naphthoquinone-based compounds under mild and green reaction conditions.
Choline chloride and itaconic acid-based deep eutectic solvent as an efficient and reusable medium for the preparation of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones
Liu, Peng,Hao, Jian-Wu,Liang, Shao-Juan,Liang, Guang-Li,Wang, Jin-Yu,Zhang, Zhan-Hui
, p. 801 - 808 (2016/03/23)
Choline chloride and itaconic acid-based deep eutectic solvent has been identified as an effective catalyst and reaction medium for synthesis of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones by condensation of 2-hydroxynaphthalene-1,4-dione wit
New basic ionic liquid from ethan-1,2-diyl bis (hydrogen sulfate) and DBU (1,8-diazobicyclo[5.4.0]undec-7-ene) as an efficient catalyst for one-pot synthesis of xanthene derivatives
Maleki, Behrooz,Akbarzadeh, Elahe,Babaee, Saeed
, p. 222 - 234 (2015/09/01)
For the first time a new basic ionic liquid from ethan-1,2-diyl-bis (hydrogen sulfate) and 1,8-diazobicyclo[5.4.0]undec-7-ene was suggested. The catalytic activity of the new ionic liquid was tested for synthesis of xanthene derivatives by condensation of aldehydes with i) dimedone ii) β-naphthol iii) 2-hydroxynaphthalene-1,4-dione iv) dimedone and β-naphthol v) 2-hydroxynaphthalene-1,4-dione and dimedone vi) β-naphthol and 2-hydroxynaphthalene-1,4-dione. This approach is a clean, environmentally friendly and convenient work up protocol. The new ionic liquid is an effective and inexpensive catalyst that could easily be recycled and reused five times without significant loss of catalytic activity.
N-Sulfonic acid poly(4-vinylpyridinium) hydrogen sulfate as an efficient and reusable solid acid catalyst for one-pot synthesis of xanthene derivatives in dry media under ultrasound irradiation
Khaligh, Nader Ghaffari,Shirini, Farhad
, p. 397 - 403 (2014/11/07)
N-Sulfonic acid poly(4-vinylpyridinium) hydrogen sulfate catalyzed efficiently the synthesis of xanthene derivatives under ultrasonic irradiation at room temperature, which has prompted various concerns involving cost and environmental persistence. This methodology shows the effect of presence of anion hydrogen sulfate as an important and effective factor on the promotion of the one-pot multi-components and condensation reactions. The catalyst can be recovered by simple filtration and used for several times without a significant loss of catalytic activity.
Acid catalyzed efficient syntheses of aryl-5H-dibenzo[b,i]xanthene-5,7,12,14-(13H)-tetraones and 3,3-(arylmethylene)bis(2-hydroxynaphthalene-1,4-diones) and in vitro evaluation of their antioxidant activity
Khurana, Jitender M.,Lumb, Anshika,Chaudhary, Ankita,Nand, Bhaskara
, p. 1747 - 1751 (2015/01/09)
A simple and efficient synthesis of aryl-5H-dibenzo[b,i]xanthene-5,7,12,14-(13H)-tetraones and 3, 3-(arylmethylene)bis(2-hydroxynaphthalene-1,4-diones) by the condensation of aromatic aldehydes and 2-hydroxy-1,4-naphthoquinone under extremely mild conditi
Synthesis of benzoxanthene derivatives using Bronsted acidic ionic liquids (BAILs), 2-pyrrolidonium hydrogen sulfate and (4-sulfobutyl)tris(4- sulfophenyl)phosphonium hydrogen sulfate
Shaterian, Hamid Reza,Ranjbar, Mohammad,Azizi, Kobra
experimental part, p. 95 - 99 (2012/02/17)
Bronsted acidic ionic liquids (BAILs), 2-pyrrolidonium hydrogen sulfate and (4-sulfobutyl)tris(4-sulfophenyl)phosphonium hydrogen sulfate are found to be efficient catalysts for synthesis of 14-aryl-14H-dibenzo[a,i] xanthene-8,13-dione, 3,4-dihydro-1H-benzo[b]xanthene-1,6,11(2H,12H)-trione, and aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraone derivatives.
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
Rahmati, Abbas
experimental part, p. 761 - 764 (2011/11/12)
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 (
A simple procedure for the synthesis of benzoxanthene derivatives under microwave irradiation conditions
Chen, Yan,Wu, Shanshan,Tu, Shujiang,Li, Chunmei,Shi, Feng
, p. 931 - 934 (2008/09/21)
(Chemical Equation Presented) A rapid and efficient method is developed to synthesize a series of benzoxanthene derivatives by the reaction of aldehydes and 2-hydroxynaphthalene-1,4-dione in mixed solvent of acetic acid and ethylene glycol under microwave irradiation. The method has the advantages of short synthetic route, operational simplicity and higher yields (70%~85%).