36441-29-9Relevant articles and documents
Facile montmorillonite K-10-supported synthesis of xanthene derivatives under microwave and thermal conditions
Sharifi, Ali,Abaee, M. Saeed,Tavakkoli, Azam,Mirzaei, Mojtaba,Zolfaghari, Alireza
, p. 2958 - 2966 (2008)
Microwave-assisted and thermal condensations of aromatic and aliphatic aldehydes with β-naphthol adsorbed onto montmorillonite K-10 were conducted in a one-pot procedure leading to the formation of a variety of xanthene derivatives. Under microwave irradi
Cation-exchange resins: Efficient heterogeneous catalysts for facile synthesis of dibenzoxanthene from β-naphthol and aldehydes
Patil, Sachin,Bhat, Ramakrishna,Samant, Shriniwas
, p. 2163 - 2168 (2006)
β-Naphthol reacts with alkyl and aryl aldehydes in the presence of Indion-130 to give 14-alkyl/aryl-14H[ a,j ]dibenzoxanthenes in good yield. Copyright Taylor & Francis Group, LLC.
Efficient synthesis of aryl-14H-dibenzo[a.j]xanthenes using NaHSO4-SiO2 or 5%WO3/ZrO2 as heterogeneous catalysts under conventional heating in a solvent-free media
Nagarapu, Lingaiah,Baseeruddin,Kumari, N. Vijaya,Kantevari, Srinivas,Rudradas
, p. 2519 - 2525 (2007)
A simpler and greener protocol has been developed for the preparation of aryl-14H-dibenzo[a.j]xanthenes: a one-pot condensation of β-naphthol and aryl aldehydes, in the presence of silica-supported sodium hydrogen sulfate (NaHSO4·SiO2) or tungstated zirco
BF3·SiO2: an efficient alternative for the synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes
Mirjalili, Bi Bi Fatemeh,Bamoniri, Abdolhamid,Akbari, Ali
, p. 6454 - 6456 (2008)
Silica-supported boron trifluoride (BF3·SiO2) is an efficient, readily available, and reusable catalyst for the synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes by condensation of 2-naphthol and aldehydes. This reaction under
A simple and efficient one-pot bis-bromine-1,4-diazabicyclo [2.2.2]octane (Br2-DABCO) catalyzed synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions
Ghasemnejad-Bosra, Hassan,Forouzani, Mehdi
, p. 83 - 85 (2011)
Bis-bromine-1,4-diazabicyclo[2.2.2]octane (Br2-DABCO) is an efficient, readily available, and reusable catalyst for the synthesis of 14-aryl-14 H-dibenzo[a,j]xanthenes 3 by condensation of β-naphthol 2 and aldehydes 1. This reaction under solve
Sulfamic acid functionalized 3D-network nanoporous polymer based on calix[4]resorcinarene: a recyclable heterogeneous nanocatalyst for the efficient synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under thermal neat conditions
Mouradzadegun, Arash,Mostafavi, Mahsa Alsadat,Ganjali, Mohammad Reza
, p. 25 - 36 (2018)
Abstract: The new synthesized sulfamic acid functionalized catalyst on the basis of calix[4]resorcinarene catalyzed successfully and efficiently the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives through a one-pot condensation reaction of β-nap
Facile fabrication of bimetallic Fe-Mg MOF for the synthesis of xanthenes and removal of heavy metal ions
Abo El-Yazeed, W. S.,Abou El-Reash, Y. G.,Ahmed, Awad I.,Elatwy, L. A.
, p. 9693 - 9703 (2020)
This work reported the preparation of Mg-MOF, Fe-MOF and Fe-Mg MOF by a solvothermal technique and their characterization with FT-IR, XRD, SEM, EDS, TEM and SBET analyses. The nanoparticle diameter ranged from 3.1 to 10.9 nm. The acidity of the
The efficient synthesis of 14-alkyl or aryl 14H-dibenzo[a,j]xanthenes catalyzed by bismuth(III) chloride under solvent-free conditions
Soleimani, Ebrahim,Khodaei, Mohammad Mehdi,Taheri Kal Koshvandi, Afsaneh
, p. 927 - 930 (2011)
An efficient method for the synthesis of 14-alkyl or aryl 14H-dibenzo[a,j]xanthene derivatives by the reaction of β-naphthol, and aldehydes in the presence of a catalytic amount of bismuth(III) chloride (BiCl3) under solvent-free conditions at
Generation of brnsted acidic ionic liquid by keggin heteropoly acid and its application in the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes
Heravi, Majid M.,Bamoharram, Fatemeh F.,Tavakoli-Hoseini, Niloofar
, p. 616 - 620 (2011)
A new waterstable Brnsted acidic ionic liquid based on Keggin heteropoly acid was used as an environmentally benign catalytic medium in the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under mild reaction conditions. The catalyst can be easily recovered
A facile, simple and convenient method for the synthesis of 14-alkyl or aryl-14-H-dibenzo[a,j]xanthenes catalyzed by pTSA in solution and solvent-free conditions
Khosropour, Ahmad Reza,Khodaei, Mohammad Mehdi,Moghannian, Hassan
, p. 955 - 958 (2005)
An efficient and straightforward procedure for the synthesis of 14-alkyl or aryl-14-H-dibenzo[a,j]xanthenes has been achieved through the one-pot condensation of β-naphthol with alkyl or aryl aldehydes in the presence of p-toluene sulfonic acid as catalys
Novel ionic liquid [Et3N-SO3H][MeSo3]: Synthesis, characterization and catalytic performance for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes
Sadeghi-Takallo, Masoud,Zare, Abdolkarim
, p. 69 - 76 (2019)
The main aim of this work is introducing a novel protic acidic ionic-liquid catalyst for organic synthesis. Thus, N,N-diethyl-N-sulfoethanaminium methanesulfonate ([Et3N-SO3H][MeSO3]) was synthesized by the reaction of triethylamine with chlorosulfonic ac
Fluoroboric acid adsorbed on silica-gel-catalyzed synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives
Liu, Yu-Heng,Tao, Xu-Ye,Lei, Li-Qin,Zhang, Zhan-Hui
, p. 580 - 589 (2009)
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
Polyvinylpolypyrrolidone-supported boron trifluoride (PVPP-BF3): Mild and efficient catalyst for the synthesis of 14-aryl-14H-dibenzo [a,j] xanthenes and bis(naphthalen-2-yl-sulfane) derivatives
Mokhtary, Masoud,Refahati, Sepideh
, p. 378 - 381 (2013)
A convenient and an efficient method for the synthesis of 14-aryl-14H-dibenzo [a,j] xanthenes and bis(naphthalen-2-yl-sulfane) derivatives is described. The reaction proceeded via condensation of aldehydes with 2-naphthol or 2-thionaphthol in the presence
Sulfamic: acid incorporated tin oxide: Acidity and activity relationship
Abo El-Yazeed,Eladl,Ahmed, Awad I.,Ibrahim, Amr Awad
, (2020/12/28)
Herein we study the activity and acidity relationship, Sulfamic acid (SA) has been incorporated with tin oxide (Sn). Acidity measurement confirmed the presence of dual-acidic sites. SA hinders the crystallization and inhibits SnO2 crystal growth. The particle size of SnO2 (2.1–8.2 nm) and the SBET values of samples were found to be dependent on the SA content and calcination temperatures. The increase in the surface acidity was found to occur with increasing the thermal treatment up to 450 °C, while further increasing of calcination temperature is accompanied by a decrease in the surface acidity. Lewis and Bronsted acid sites play important role in the catalytic activity, The SA-Sn nanoparticles are efficient for the synthesis of 14-aryl-14H-dibenzo[a,j] xanthene under solvent-free conditions in good to excellent yields and the sample contains 25 wt% SA has the highest activity than the others under the same reaction conditions.
Solvent-free synthesis of 14-aryl-14H-dibenzo[a-j]xanthenes using Fe3O4@Al2O3@SiO2@Fe2O3 as a green catalyst
Darya, Naghmeh,Tajik, Hassan
supporting information, p. 3546 - 3564 (2021/11/04)
We report, a novel, green, nano-sized particles as a sandwich nano-capsule multilayer catalyst (SNC@MC) [Fe3O4@Al2O3@SiO2@Fe2O3] for the efficacious one-pot synthesis of 14-aryl-
