- Facile and Straightforward Synthesis of Racemic Version of Substituted 3-[3-(2-Hydroxyphenyl)-3-oxo-1-arylpropyl]-4-hydroxycoumarins: Easy Access to a Series of Biorelevant Warfarin Analogues
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The present communication deals with a straightforward, efficient, and green synthesis of a series of racemic version of 3-[3-(2- hydroxyphenyl)-3-oxo-1-arylpropyl]-4-hydroxycoumarins as biologically interesting warfarin analogues upon decarboxylative hyd
- Brahmachari, Goutam,Mandal, Mullicka,Karmakar, Indrajit
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p. 451 - 464
(2021/10/19)
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- Synthesis, photophysical properties, chemo-sensing ability and computational studies of biscoumarin derivatives
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Synthesis of biscoumarin derivatives using an environment friendly,recyclable polymeric resin as catalyst via one-pot pseudo-three component reaction was simply achieved by using numerous substituted aromatic aldehydes (1 mM) and 4-hydroxycoumarin (2 mM)
- Harichandran, G.,Nehru, S.,Surya, C. P.
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- Chitosan and functionalized graphene oxide nanocomposite as a novel and highly efficient catalyst for production of bis-coumarins under solvent-free conditions
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Chitosan and functionalized graphene oxide nanocomposite was used as efficient, sustainable, and recyclable catalyst in the production of bis-coumarins using 4-hydroxycoumarin and aromatic aldehydes under solvent-free conditions. Chitosan was first functi
- Atashrouz, Zhale,Rostami, Esmael,Zare, Abdolkarim
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p. 179 - 201
(2021/11/18)
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- Developing a highly potent anthelmintic: study of catalytic application of l-proline derived aminothiourea in rapid synthesis of biscoumarins and their in vitro anthelmintic essay
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Abstract: Due to serious side effects of benzimidazoles such as apoptosis and mitotic arrest, development of alternative anthelmintic drugs with comparable efficacy to target the acetylcholine receptors of parasites is considered very important to control
- Kharrngi, Balamphrang,Dhar, Errini Decruse,Basumatary, Grace,Das, Dharitri,Deka, Ramesh Ch,Yadav, Arun K,Bez, Ghanashyam
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- Recyclable Amberlite IR-120 Catalyzed domino reaction: Synthesis, anticancer activity and molecular docking studies of biscoumarins
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Under mild conditions, an environmentally friendly method has been developed for the synthesis of bis-coumarins by using a reasonably lesser quantity of Amberlite IR-120 through Domino Knoevenagel–Michael reaction. In which, a series of aryl aldehydes hav
- Harish, B. G.,Ismail,Shadakshari, A. J.,Sowmya, H. B. V.,Suresha Kumara, T. H.,Yamuna, A. J.
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- Unveiling the anti-tubercular properties of biscoumarins, through biological evaluation and docking studies
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Background: Biscoumarin scaffolds are known for their promising pharmacological properties. These compounds have not been studied for their activity against tuberculosis strains. Objective: Unveil the antitubercular properties of biscoumarin scaffolds. Me
- Acharya, Poornima,Ramana,Upadhyay, Manish,Pavale, Ganesh
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- Bis [hydrazinium (1+)] hexafluoridosilicate:(N2H5)2SiF6 novel hybrid crystal as an efficient, reusable and environmentally friendly heterogeneous catalyst for Knoevenagel condensation and synthesis of biscoumari
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A simple, effective, green and nontoxic protocol was used for the Knoevenagel condensation and the biscoumarin derivatives synthesis. It have demonstrated that the use of a new hybrid crystal as a heterogeneous catalyst makes it possible to obtain several
- El hajri, Fatima,Benzekri, Zakaria,Sibous, Sarra,Ouasri, Ali,Boukhris, Said,Hassikou, Amina,Rhandour, Ali,Souizi, Abdelaziz
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- CAL-B accelerated novel synthetic protocols for 3,3’-arylidenebis-4-hydroxycoumarins and dimethyl ((substituted phenyl) (phenylamino)methyl) phosphonates
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Green protocols for the syntheses of 3,3′-arylidenebis-4-hydroxycoumarins and dimethyl ((substituted phenyl) (phenylamino)methyl) phosphonates have been first time developed using biocatalyst, CAL-B (lipase). These are carried at room temperature under st
- Chavan, Anusaya S.,Kharat, Arun S.,Bhosle, Manisha R.,Dhumal, Sambhaji T.,Mane, Ramrao A.
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p. 4497 - 4512
(2021/07/26)
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- Carbon-SO3H: An efficient catalyst for the synthesis of biscoumarin under ambient reaction conditions and their in silico studies
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In this article, we have established a highly promising approach for the synthesis of biscoumarins via domino Knoevenagel–Michael condensation of 4-hydroxycoumarin and aromatic aldehydes in 2:1 ratio using carbon-SO3H as a solid acid catalyst i
- Sethiya, Ayushi,Teli, Pankaj,Manhas, Anu,Agarwal, Dinesh,Soni, Jay,Sahiba, Nusrat,Jha, Prakash,Agarwal, Shikha
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supporting information
p. 2440 - 2460
(2020/07/10)
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- Heterogeneous SO3H@Fe3O4 magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, and 1,8-dioxo-octahydroxanthene derivatives
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This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, an
- Wu, Xiaobo,Peng, Wan-Xi
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p. 2129 - 2148
(2020/06/24)
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- Aluminized Polyborate-catalyzed Environmentally Benign Solvent-free Protocol for the Synthesis of Bis-coumarin Derivatives
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The present work reports, an efficient application of aluminized polyborate as a mild solid acid catalyst for the multicomponent synthesis of biologically important bis-coumarin derivatives. The one-pot synthesis of bis-coumarins involves domino Knoevenag
- Aute, Dilip,Kshirsagar, Akshay,Kadnor, Vijay,Uphade, Bhagwat,Gadhave, Anil
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p. 599 - 605
(2021/01/25)
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- The immobilized Ni(II) species on thiourea functionalized copper ferrite: a reusable nanocatalyst for synthesis of biscoumarins under solvent-free conditions
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In this study, nanoparticles of CuFe2O4@SiO2@PTMS@Tu@Ni(II) as the reusable magnetic catalyst were prepared. Synthesis of the Ni(II)–CuFe2O4 system was carried out through a five-step procedure includ
- Zeynizadeh, Behzad,Hasanpour Galehban, Morteza,Shokri, Zahra
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p. 1493 - 1505
(2020/02/27)
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- Efficient synthesis of bis-(4-hydroxycoumarin) using sulfanilic acid as recyclable catalyst in water
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A catalytic reaction between aromatic aldehydes and 4- hydroxycoumarin has been developed to form a decent range of functionalized biscoumarin skeletons in excellent yields using sulfanilic acid as reusable catalyst in aqueous media. The catalytic reactio
- SADAT-JALALI, Mozhgan,MANAFI, Mohammadreza,HOMAMI, Seyed Saied,GORJI, Banafsheh,MONZAVI, Amirhossein
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p. 473 - 480
(2020/10/06)
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- 1,8-Diazabicyclo [5.4.0] undec-7-ene functionalized cellulose nanofibers as an efficient and reusable nanocatalyst for the synthesis of tetraketones in aqueous medium
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Abstract: 1,8-Diazabicyclo [5.4.0] undec-7-ene functionalized cellulose nanofibers (CNF@DBU[Cl]) were simply prepared and characterized by analytical techniques. Scanning electron microscope confirmed that CNF@DBU[Cl] was formed with average size of 30–60?nm. X-ray diffraction of CNF@DBU[Cl] showed that the crystalline structure of the cellulose nanofibers was remained unchanged after functionalization. According to elemental analyses and thermal gravimetric analysis, the loading amount of organic group on cellulose nanofibers was found to be 1.46?mmol/g. The catalytic activity of DBU functionalized cellulose nanofibers was studied for the synthesis of biologically important tetraketone derivatives in the reaction of aldehydes with 1,3-dicarbonyl compounds. In the presence of CNF@DBU[Cl], the corresponding tetraketones were obtained in 80–96% yields under very mild reaction conditions. The catalyst was recovered and reused four successive runs without significant loss of catalytic activity. This method showed several significant advantages including short reaction times, high yields of products, use of various substrates, convenient work-up, no necessity of extraction or chromatographic purification steps, environmentally friendly conditions and lack of use of any harmful solvent. Graphic abstract: [Figure not available: see fulltext.].
- Lasemi, Zahra,Tajbakhsh, Mahmood,Alinezhad, Heshmatoallah,Mehrparvar, Forough
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p. 3667 - 3682
(2020/05/13)
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- Fabrication and characterization of the immobilized Cu(II) and Ni(II) species on silica-coated copper ferrite: as novel magnetically reusable nanocatalysts toward synthesis of biscoumarins
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In this study, we have synthesized magnetically nanoparticles (MNPs) of CuFe2O4@SiO2@AAPTMS@Ni(II) and CuFe2O4@SiO2@AAPTMS@Cu(II). The prepared nanocomposite systems were characterized usin
- Zeynizadeh, Behzad,Sadeghbari, Maryam,Noroozi Pesyan, Nader
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- A novel nanomagnetic solid acid catalyst for the synthesis of new functionalized bis-coumarin derivatives under microwave irradiations in green conditions
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In this study, a novel, green, environmentally friendly and magnetically heterogeneous catalyst based on the immobilization of sulfosalicylic acid onto Fe3O4 nanoparticles (Fe3O4@sulfosalicylic acid MNPs) is rep
- Zare-Akbari, Zhila,Dastmalchi, Siavoush,Edjlali, Ladan,Dinparast, Leila,Es'haghi, Moosa
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- Porcine pancreas lipase as a green catalyst for synthesis of bis-4-hydroxy coumarins
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4-Hydroxycoumarins represents an important structural motif in life sciences molecules with remarkable biological properties. 4-Hydroxycoumarins are important precursors in the synthesis of organic compounds and critical pharmacophores in medicinal chemis
- Bavandi, Hossein,Habibi, Zohreh,Yousefi, Maryam
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- One-pot cascade synthesis of benzopyrans and dihydropyrano[c]chromenes catalyzed by lipase TLIM
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Lipase TLIM was reported to be an efficient, commercially available and reusable catalyst for the Knoevenagel-Michael cascade reactions of aldehydes, malononitrile/ethyl cyanoacetate and 4-hydroxycoumarin/1, 3-cyclohexanedione/dimedone in aqueous DMSO. Th
- Fu, Yajie,Lu, Zeping,Ma, Xiaolong,Fang, Ke,He, Xinyi,Xu, Huajin,Hu, Yi
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- The magnetic nanostructured natural hydroxyapatite (HAP/Fe3O4 NPs): an efficient, green and recyclable nanocatalyst for the synthesis of biscoumarin derivatives under solvent-free conditions
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Abstract: The magnetic nanostructured natural hydroxyapatite (HAP/Fe3O4 NPs) as a novel magnetic nanocatalyst was synthesized and fully characterized. The excellent catalytic activity of HAP/Fe3O4 NPs was investigated in the synthesis of biscoumarin derivatives under mild, green and solvent-free conditions. A series of aromatic (bearing different functional groups), heteroaromatic and aliphatic aldehydes have been converted to biscoumarins with good to excellent isolated yields. The significant advantages offered by the present method in close agreement with green chemistry principles are: catalyst is inexpensive, non-toxic, easy handling and reusable up to six recycle runs, magnetic separation of nanostructured catalyst, simple work-up procedure, short reaction time, high yields of products and using solvent-free conditions. Graphical abstract: [Figure not available: see fulltext.].
- Akhlaghinia, Batool,Sanati, Parvin,Mohammadinezhad, Arezou,Zarei, Zeinab
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- Anion functionalized ionic liquid from artificial sugar: A sustainable pathway for diverse bis-enol derivatives
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An artificial sugar saccharine based anion-functionalized ionic liquid [Bmim]Sac was synthesized and used for new and straightforward strategies for the construction of a diverse range of bis-enols. The advantage of this methodology is the use of a non-to
- Sharma, Himani,Srivastava, Suman
-
supporting information
p. 12054 - 12058
(2019/08/07)
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- Strongly proton exchanged montmorillonite K10 (H+-Mont) as a solid acid catalyst for highly efficient and environmental benign synthesis of biscoumarins via tandem Knoevenagel–Michael reaction
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In this study, synthesis of micro/meso porous acid-activated montmorillonite K10 (H+-Mont) was carried out by the activation of Na+-montmorillonite with HCl (4 M) at the controlled conditions. The prepared H+-Mont clay was
- Zeynizadeh, Behzad,Rahmani, Soleiman,Ilkhanizadeh, Siamand
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- Zinc (II) incorporated porous organic polymeric material (POPs): A mild and efficient catalyst for synthesis of dicoumarols and carboxylative cyclization of propargyl alcohols and CO2 in ambient conditions
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Zinc (II) incorporated porous organic polymer catalyst, Zn@BBAPA has been designed, synthesized and characterized thoroughly by XRD, EDX, SEM, HR-TEM, FTIR spectra, UV–vis spectra, TGA and N2 absorption desorption isotherm. An eco-friendly porous Zn@BBAPA catalyst exhibits highly efficient catalytic performance for the production of α-alkylidene cyclic carbonates by using propargylic alcohols viaCO2 fixation.In addition the catalyst shows outstanding efficiency for the synthesis of various dicoumarol derivatives in green solvent medium (water)from 4-hydroxycoumarin and aromatic aldehydes. Presence of super hydrophobic nature and electron-donation characterof NH2 groups of BBA framework with high surface area is main aspect to be responsible for elevated catalytic performance as well as improvement in catalyst stability and enabling a good recyclability.
- Islam, Sk Safikul,Salam, Noor,Molla, Rostam Ali,Riyajuddin, Sk,Yasmin, Nasima,Das, Debasis,Ghosh, Kaushik,Islam, Sk Manirul
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- V2O5 based quadruple nano-perovskite as a new catalyst for the synthesis of bis and tetrakis heterocyclic compounds
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In this article, we presented a novel, efficient and facile approach for using strontium titanate supported catalyst in organic synthesis. Bis and tetrakis of coumarin, indole and xanthene derivatives can effortlessly have prepared using V2Osu
- Khatab, Tamer K.,Abdelghany, Amr Mohamed,Soliman, Hanan A.
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- Thiamine hydrochloride as a recyclable organocatalyst for the synthesis of bis(indolyl)methanes, tris(indolyl)methanes, 3,3-di(indol-3-yl)indolin-2-ones and biscoumarins
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Thiamine hydrochloride was identified as an eco-friendly organocatalyst for the synthesis of a broad range of bis(indolyl)methanes in good to excellent yields. Green chemistry matrix calculations showed high atom economy and a small E-factor for the reaction. Moreover, the simple and easy operational protocol using a small amount of thiamine hydrochloride (1 mol%) makes this procedure an alternative approach for this transformation industrially. This protocol was also extended to the synthesis of naturally occurring alkaloids such as tris(indolyl)methane, arundine, vibrindole A, 3,3-di(indol-3-yl)indolin-2-ones and biscoumarin derivatives.
- Mathavan, Sivagami,Kannan, Keerthana,Yamajala, Rajesh B. R. D.
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supporting information
p. 9620 - 9626
(2019/11/20)
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- Anchored Ni-dimethylglyoxime complex on Fe3O4?SiO2 core/shell nanoparticles for the clean catalytical synthesis of dicoumarols
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Ni-Dimethylglyoxime complex immobilized on functionalized Fe3O4 was synthesized by a post-grafting way and utilized as a novel, thermally stable, recoverable, and efficient for green synthesis of dicoumarols through reaction of 4-hyd
- Hassanloie, Nishtman,Noroozi Pesyan, Nader,Sheykhaghaei, Golaleh
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- Ni0 NPs anchored on acid-activated montmorillonite (Ni0-Mont) as a highly efficient and reusable nanocatalyst for synthesis of biscoumarins and bisdimedones
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Ni0 nanoparticles were immobilized on acid-activated montmorillonite (Ni0-Mont) by anchoring Ni(OAc)2·4H2O on modified micro/mesoporous montmorillonite followed by reduction with ethylene glycol. The prepared cl
- Rahmani, Soleiman,Zeynizadeh, Behzad
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p. 1227 - 1248
(2018/12/11)
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- Synthesis and characterization of a magnetic graphene oxide/Zn-Ni-Fe layered double hydroxide nanocomposite: An efficient mesoporous catalyst for the green preparation of biscoumarins
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In this study, a nanocomposite of Fe3O4@GO@Zn-Ni-Fe-layered double hydroxide was synthesized as a novel and efficient mesoporous magnetic nanocatalyst. The synthesis was carried out via the immobilization of Fe3O4/su
- Zeynizadeh, Behzad,Gilanizadeh, Masumeh
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p. 18794 - 18804
(2019/12/09)
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- Magnetic nanoparticles tris(hydrogensulfato) boron as an efficient heterogeneous acid catalyst for the synthesis of α,?-benzylidene bis(4-hydroxycoumarin) derivatives under solvent-free condition
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Nano-ferrite supported tris(hydrogensulfato) boron [Fe3O4@B(HSO4)3] was prepared by entrapping Fe3O4 magnetic nanoparticles as the core and tris(hydrogensulfato) boron B(HSO4)su
- Hayati, Payam,Eghbali, Khadijeh,Rezaei, Ramin
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p. 5067 - 5089
(2019/06/28)
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- Investigation of catalytic, anti-bacterial, anti-oxidant, and DNA cleavage properties of bimetallic and trimetallic magnetic nanoalloys base on cupper
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Bimetallic and trimetallic magnetic nanoalloys base on cupper were easily prepared from their starting materials. These nanoparticles (NPs) were used for the synthesis of biscoumarines by two-component one-pot domino Knoevenagel-type condensation/Michael
- Parvanak Boroujeni, Kaveh,Farokhnia, Ahmad,Shahrokh, Mansooreh,Mobini, Mohsen
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p. 521 - 529
(2019/04/25)
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- Use of PS-Zn-anthra complex as an efficient heterogeneous recyclable catalyst for carbon dioxide fixation reaction at atmospheric pressure and synthesis of dicoumarols under greener pathway
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A polystyrene functionalized Zinc anthranilic acid complex catalyst has been prepared. The PS-Zn-anthra complex has been characterized by EDX, Scanning electron micrographs (FE-SEM), FTIR spectra, UV–vis spectra and thermogravimetric analyses. A greener a
- Ghosh, Swarbhanu,Mondal, Paramita,Das, Debasis,Tuhina, Kazi,Islam, Sk. Manirul
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- A reusable magnetic nickel nanoparticle based catalyst for the aqueous synthesis of diverse heterocycles and their evaluation as potential anti-bacterial agent
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A library of biologically important heterocycles, viz. pyrazolyl pyrimidine-triones, bis(heterocyclyl)methanes were successfully synthesised by the condensation of barbituric acid, pyrazolone with an aldehyde and dimedone/4-hydoxy coumarin with various su
- Bhattacharjee, Deboshikha,Sheet, Sanjoy Kumar,Khatua, Snehadrinarayan,Biswas, Koel,Joshi, Santaram,Myrboh, Bekington
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supporting information
p. 5018 - 5028
(2018/09/11)
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- Synthesis of bis-coumarins over acetic acid functionalized poly(4-vinylpyridinum) bromide (APVPB) as a green and efficient catalyst under solvent-free conditions and their biological activity
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Abstract: In this work, acetic acid functionalized poly(4-vinylpyridinum) bromide as a green and reusable catalyst was successfully tested on the synthesis of various bis-coumarins under solvent-free conditions. In addition, antioxidant and anti-inflammat
- Noroozizadeh, Ehsan,Moosavi-Zare, Ahmad Reza,Zolfigol, Mohammad Ali,Zarei, Mahmoud,Karamian, Roya,Asadbegy, Mostafa,Yari, Siamak,Farida, Seyed Hamed Moazzami
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p. 471 - 481
(2018/03/29)
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- Visible Light-Induced Synthesis of Biscoumarin Analogs under Catalyst-Free Conditions
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Biscoumarin analogs were synthesized by the reaction between two equivalent of 4-hydroxycoumarin and one equivalent of aryl aldehydes induced by visible light [22?W compact fluorescent lamp (CFL) bulb]. This new method is simple, cost-effective, and furni
- Nadaf, Ankusab Noorahmadsab,Shivashankar, Kalegowda
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p. 1375 - 1381
(2018/06/20)
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- Dicoumarol derivatives: Green synthesis and molecular modelling studies of their anti-LOX activity
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Dicoumarol derivatives were synthesized in the InCl3 catalyzed pseudo three-component reactions of 4-hydroxycoumarin with aromatic aldehydes in excellent yields. The reactions were performed in water under microwave irradiation. All synthesized
- Simijonovi?, Du?ica,Vlachou, Evangelia-Eirini,Petrovi?, Zorica D.,Hadjipavlou-Litina, Dimitra J.,Litinas, Κonstantinos E.,Stankovi?, Nevena,Mihovi?, Nezrina,Mladenovi?, Milan P.
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p. 741 - 752
(2018/08/06)
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- A nano-composite of magnetite and hot-water-soluble starch: A cooperation resulting in an amplified catalytic activity on water
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Bis-coumarins and xanthenes are privileged compounds with diverse pharmaceutical activities. Hence, we introduce here an efficient synthesis of 3,3′-arylmethylene-bis-(4-hydroxycoumarin-3-yl) and 1,8-dioxooctahydroxanthenes under the soft catalytic activi
- Razikazemi, Sanaz,Rad-Moghadam, Kurosh,Toorchi-Roudsari, Saeedeh
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supporting information
p. 12476 - 12485
(2018/08/04)
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- Grinding technique for the tandem synthesis of BIS coumarinyl methanes using [BDBDMIm]Br-CAN
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3,3-(Butane-1,4-diyl)bis(1,2-dimethyl-1H-imidazole-3-ium)bromide ([BDBDMIm]Br) is easily used as an efficient and recyclable ionic liquid for the synthesis of bis coumarinyl methanes in the presence of a catalytic amount of ceric ammonium nitrate (CAN) under grinding. All reactions are performed in the absence of solvent in excellent yield during short reaction time. Furthermore, the ionic liquid can be reused and recovered for several times without loss of activity. This method provides several advantages such as simple work-up, environmental friendliness and shorter reaction time along with high yields. All of synthesized compounds were characterized by infrared spectroscopy,1H and13C nuclear magnetic resonance spectroscopy and elemental analyses.
- Nikpassand, Mohammad,Fekri, Leila Zare,Sahrapeima, Sanaz
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p. 323 - 329
(2017/12/12)
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- BiVO4-NPs: an efficient nano-catalyst for the synthesis of biscoumarins, bis(indolyl)methanes and 3,4-dihydropyrimidin-2(1H)-ones (thiones) derivatives
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BiVO4-NPs can be used as an efficient and reusable nano-catalyst for the promotion of the synthesis of biscoumarins, bis(indolyl)methanes and 3,4-dihydropyrimidin-2(1H)-ones (thiones) derivatives. The structures of the products were characteriz
- Shirini, Farhad,Lati, Monireh Pourghasemi
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- Fast highly efficient 'on-solvent' non-catalytic cascade transformation of benzaldehydes and 4-hydroxycoumarin into bis(4-hydroxycoumarinyl)arylmethanes
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Non-catalytic cascade reaction of benzaldehydes and two equivalents of 4-hydroxycoumarin initiated by reflux in propanol results in the fast (15 min) and efficient formation of substituted tetrahydro-1H-xanthen-1-ones in 93-98% yields. The developed fast
- Elinson, Michail N.,Vereshchagin, Anatoly N.,Sokolova, Olga O.
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p. 121 - 129
(2017/06/19)
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- Fast highly efficient 'on-solvent' non-catalytic cascade transformation of benz-aldehydes and 4-hydroxycoumarin into bis(4-hydroxycoumarinyl)arylmethanes
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Non-catalytic cascade reaction of benzaldehydes and two equivalents of 4-hydroxycoumarin initiated by reflux in propanol results in the fast (15 min) and efficient formation of substituted tetrahydro-1H-xanthen-1-ones in 93-98% yields. The developed fast
- Elinson, Michail N.,Vereshchagin, Anatoly N.,Sokolova, Olga O.
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p. 121 - 129
(2021/03/30)
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- Friedel-Crafts alkylation of 4-hydroxycoumarin over silica-bonded 1,4-diaza-bicyclo[2.2.2] octane-sulfonic acid chloride as nanostructured heterogeneous catalyst
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A novel nanostructured heterogeneous catalyst, namely silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride (SBDBSAC), has been synthesized and fully characterized by several techniques, including Fourier transform infrared spectroscopy (FTI
- Noroozizadeh, Ehsan,Moosavi-Zare, Ahmad Reza,Zolfigol, Mohammad Ali,Zare, Abdolkarim,Zarei, Mahmoud
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- Trityl bromide versus nano-magnetic catalyst in the synthesis of henna-based xanthenes and bis-coumarins
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Abstract: In this work, trityl bromide (TrBr) as a new, efficient, mild and neutral catalyst was used for the synthesis of henna-based xanthenes (aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones) and bis-coumarins by in situ generation of trityl carb
- Zarei, Mahmoud,Zolfigol, Mohammad Ali,Moosavi-Zare, Ahmad Reza,Noroozizadeh, Ehsan
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p. 2187 - 2198
(2017/09/13)
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- Efficient synthesis of bis(indolyl)methanes, bispyrazoles and biscoumarins using 4-sulfophthalic acid
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4-Sulfophthalic acid (4-H3SPA) solution 50?wt% in H2O has been effectively catalyzed the synthesis of a series of biologically relevant bis(indolyl)methanes by the electrophilic substitution of indole derivatives on aldehyde compound
- Banari, Hoda,Kiyani, Hamzeh,Pourali, Alireza
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p. 1635 - 1649
(2017/02/15)
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- Zwitterionic liquid (ZIL) coated CuO as an efficient catalyst for the green synthesis of bis-coumarin derivatives: via one-pot multi-component reactions using mechanochemistry
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A convenient, solvent free strategy for the synthesis of bis-coumarins has been developed using zwitterionic liquid (ZIL) coated copper oxide (CuO) and mechanical ball milling. The ZIL were fabricated from imidazolium/benzimidazolium and sulfonate/carboxy
- Mayank,Singh, Amanpreet,Raj, Pushap,Kaur, Randeep,Singh, Ajnesh,Kaur, Navneet,Singh, Narinder
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p. 3872 - 3881
(2017/07/12)
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- Highly efficient synthesis of dicoumarols and xanthene derivatives in presence of Br?nsted–Lewis acidic ionic liquids catalyst
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A series of metal chloride-based acidic ionic liquids have been prepared and used as an efficient catalyst in one-pot multicomponent synthesis of biscoumarins and substituted xanthenes derivatives under solvent-free conditions. Among the acidic ionic liqu
- Abbasi, Faezeh,Azizi, Najmedin,Abdoli-Senejani, Masumeh
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p. 2097 - 2103
(2017/09/13)
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- Simple protic ionic liquid [Et3NH][HSO4] as a proficient catalyst for facile synthesis of biscoumarins
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Abstract: We have explored a number of protic ionic liquids (PILs) as a catalyst for the synthesis of biscoumarins by condensation of 4-hydroxycoumarin with an aromatic aldehyde. Methylimidazolium- and triethylammonium-based PILs were synthesized by simple neutralization reaction with protic acids. Triethylammonium hydrogen sulfate [Et3NH][HSO4] was found to be the best among the studied PILs concerning the yield of products and reaction time period. Different biscoumarin derivatives were synthesized based on 4-hydroxycoumarin and various substituted aromatic aldehydes at optimum reaction conditions. Obtained products were separated just by simple filtration. The facile method does not require additional purification for formed products. The catalyst has shown better yields along with outstanding recyclability, providing an environmental benign protocol for the synthesis of biscoumarin derivatives. Graphical Abstract: Screening of simple protic ionic liquids as a catalyst in the synthesis of biscoumarins, out of which [Et3NH][HSO4] was found to be best among the studied PILs.
- Patil, Sandip K.,Awale, Deepak V.,Vadiyar, Madagonda M.,Patil, Suryakant A.,Bhise, Sagar C.,Kolekar, Sanjay S.
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p. 5365 - 5376
(2017/09/23)
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- Caffeine-H3PO4: a novel acidic catalyst for various one-pot multicomponent reactions
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Caffeine-H3PO4 along with caffeine-HClO4 and caffeine-HNO3 have been prepared and applied for one-pot preparation of bis(indolyl) methanes, 4,4′-(arylmethylene) bis(1H-pyrazol-5-ols), 3,3′-(arylmethylene) bis(4-hydroxycoumarins), 2,4,5-trisubstituted imidazoles, 1‐amidoalkyl‐2‐naphthols, and polyhydroquinolines. The catalysts were characterized using Fourier-transform infrared (FTIR) spectroscopy, 1H and 13C nuclear magnetic resonance (NMR), powder X-ray diffraction (PXRD) analysis, thermogravimetric analysis (TGA), and liquid chromatography (LC)–mass spectroscopy (MS) techniques. The results indicated high product yield, short reaction time, facile separation of catalyst, and easy work-up procedure, suggesting that caffeine-H3PO4 can be considered to be an efficient acidic catalyst for organic transformations.
- Saghanezhad, Seyyed Jafar,Sayahi, Mohammad Hosein,Imanifar, Iman,Mombeni, Mostafa,Deris Hamood, Sajedeh
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p. 6521 - 6536
(2017/10/06)
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- Ionic liquid [Dabco-H][AcO] as a highly efficient and recyclable catalyst for the synthesis of various bisenol derivatives: Via domino Knoevenagel-Michael reaction in aqueous media
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A simple and highly efficient domino Knoevenagel-Michael reaction procedure for the synthesis of a series of bisenols has been successfully developed. In the presence of 1,4-diazabicyclo[2.2.2]octane (Dabco)-based ionic liquid catalysts, which are environ
- Yang, Cheng,Su, Wan-Qi,Xu, Da-Zhen
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p. 99656 - 99663
(2016/11/09)
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- Nano-copper chromite (nano-CuCr2O4): a novel and efficient catalyst for the synthesis of biscoumarin and pyrano[c]chromene derivatives in water at room temperature
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A clean, efficient and eco-friendly procedure has been developed using nano-copper chromite (nano-CuCr2O4) as catalyst for the synthesis of biscoumarin and dihydropyrano[c]chromene derivatives. This method provides several advantages
- Karimi-Jaberi, Zahed,Moaddeli, Mohammad Sadegh,Setoodehkhah, Moslem,Nazarifar, Mohammad Reza
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p. 4641 - 4650
(2016/07/06)
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- Synthesis of the first nanomagnetic particles with semicarbazide-based acidic ionic liquid tag: an efficient catalyst for the synthesis of 3,3′-(arylmethylene)bis(4-hydroxycoumarin) and 1-carbamato-alkyl-2-naphthol derivatives under mild and green conditi
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Semicarbazide functionalized with chlorosulfonic acid on the surface of silica-coated magnetic nanoparticles, {Fe3O4@SiO2@(CH2)3Semicarbazide-SO3H/HCl}, as a novel magnetic Br?nsted acid ca
- Zolfigol, Mohammad Ali,Ayazi-Nasrabadi, Roya,Baghery, Saeed
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p. 500 - 509
(2016/07/16)
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- Catalytic performance of a Keplerate-type, giant-ball nanoporous isopolyoxomolybdate as a highly efficient recyclable catalyst for the synthesis of biscoumarins
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In continuation of our previous works on the application of (NH4)42[MoVI 72MoV 60O372(CH3COO)30(H2O)72], a Keplerate-type giant-ball n
- Davoodnia, Abolghasem,Nakhaei, Ahmad,Tavakoli-Hoseini, Niloofar
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p. 219 - 225
(2016/04/19)
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