107752-97-6Relevant articles and documents
A novel anionic di-oxido vanadium(V) Schiff base complex: Synthesis, spectral characterization, X ray crystal structure, catalytic activity for the preparation of tetrahydro-4H-chromene derivatives and antibacterial properties
Khosravan, Mehrji,Abdolahi, Leila,Ebrahimipour, S. Yousef
, (2021)
In this work, a tridentate ONO Schiff base ligand,1-[(((2-hydroxyphenyl)imino)methyl)]naphthalen-2-ol [H2L] and its di-oxido vanadium(V) complex [(VO2(L)](NHET3) have been synthesized and fully characterized using elementa
A general and inexpensive protocol for the nanomagnetic 5-sulfosalicylic acid catalyzed the synthesis of tetrahydrobenzo[b]pyrans and quinoxaline derivatives
Saboury, Farzaneh,Azizi, Najmedin,Mirjafari, Zohreh,Mahmoudi Hashemi, Mohammad
, p. 2533 - 2543 (2020)
In this study, a novel acid-functionalized magnetic nanoparticles with high loaded multifunctional acidic groups was fabricated by anchoring water-soluble 5-sulfosalicylic acid onto the surface silica-modified Fe3O4. The magnetically recyclable Fe3O4@SiO2@5-SA (20?mg) showed excellent reactivity for greener synthesis of tetrahydrobenzo[b]pyrans via a three-component reaction of different aromatic aldehydes, malononitrile and dimedone in good to excellent yields (70–95percent) in pure water at short reaction times (40–150?min). The method shows eco-friendly synthesis of quinoxaline derivatives from direct condensation of substituted 1,2-diamine with various 1,2-dicarbonyl in ethanol at room temperature to afford the desired quinoxalines with good to excellent yields (60–97percent) at shorter reaction times (120–240?min). The morphology and magnetic properties of MNPs were studied with scanning electron microscopy, X-ray powder diffraction, Fourier translation infrared spectroscopy, vibrating sample magnetometer and thermogravimetric. The results showed that the Fe3O4@SiO2@5-SA catalyst is completely recoverable by an external magnet and retained catalytic activity after five recycles.
A facile and efficient synthesis of new polysubstituted indeno[1,2-b]pyridines via one-pot, three-component microwave-assisted reaction
Tu, Shujiang,Jiang, Bo,Zhang, Junyong,Zhang, Yan,Jia, Runhong,Li, Chunmei,Zhou, Dianxiang,Cao, Longji,Shao, Qingqing
, p. 480 - 484 (2007)
A rapid and efficient method is developed to synthesize new polysubstituted indeno[1,2-b]pyridines via three-component microwave-assisted reaction of arylidenemalononitrile, 1,3-indanedione and aromatic amine. This method has the advantages of short synth
A facile one-pot green synthesis and antibacterial activity of 2-amino-4H-pyrans and 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes
Kumar, Dalip,Reddy, V. Buchi,Sharad, Shashwat,Dube, Urvashi,Kapur, Suman
, p. 3805 - 3809 (2009)
A facile one-pot expeditious synthesis of 2-amino-4H-pyrans and 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes has been described under solvent-free conditions using magnesium oxide as a catalyst in very good yields. The reaction catalyst, magnesium oxide
An Effective One-Pot Access to 2-Amino-4H-benzo[b]pyrans and 1,4-Dihydropyridines via γ-Cyclodextrin-Catalyzed Multi-Component Tandem Reactions in Deep Eutectic Solvent
Xiong, Xingquan,Yi, Chao,Liao, Xu,Lai, Shilin
, (2019)
Abstract: A simple, highly efficient and green route for the synthesis of 2-amino-4H-benzo[b]pyrans and 1,4-dihydropyridines has been developed by using γ-cyclodextrin (γ-CD) as catalyst in deep eutectic solvent (DES) of urea-choline chloride (urea-ChCl),
Solvent-free synthesis of compounds containing chromene core catalyzed by novel Br?nsted acidic ionic liquids-ClO4
Taib, Layla A.,Keshavarz, Mosadegh,Parhami, Abolfath
, p. 1128 - 1137 (2021)
A series of novel sulfonic acid-functionalized Br?nsted acidic ionic liquids (BAILs) with perchlorate counter anion are introduced. These ionic liquid catalysts were prepared through simple and eco-friendly procedures in high yields. Various analytical te
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x
, p. 953 - 960 (2002)
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Nano-titania-supported Preyssler-type heteropolyacid: An efficient and reusable catalyst in ultrasound-promoted synthesis of 4H-chromenes and 4H-pyrano[2,3-c]pyrazoles
Azarifar, Davood,Khatami, Seyed-Mola,Nejat-Yami, Razieh
, p. 95 - 101 (2014)
An efficient and convenient procedure has been described for one-pot multi-component synthesis of tetrahydrobenzo[b]pyrans known as 4H-chromenes and 1,4-dihydropyrano[2,3-c]pyrazole derivatives in the presence of nano-titania-supported Preyssler-type hete
Synthesis of novel 9,9-dimethyl-8,12-dihydro-9H-chromeno[3,2-e] [1,2,4] triazolo[1,5-c]pyrimidin-11(10H)-one derivatives
Wang, Zhong-Xia,Lia, Bei,Xing, Zheng,Chen, Li-Zhuang,Han, Guang-Fan
, p. 480 - 485 (2014)
Novel 9,9-dimethyl-8,12-dihydro-9H-chromeno[3,2-e][1,2,4]triazolo[1,5-c] pyrimidin-11(10H)-one derivatives were synthesised by the reactions of triethyl orthoformate or aromatic aldehydes with chromeno[2,3-d]pyrimidine derivatives, which were prepared by
A convenient synthesis of 2-amino-5,6,7,8-tetrahydro-5-oxo-4-aryl-7,7-dimethyl-4H-benzo-[b]-pyran-3 -carbonitrile under microwave irradiation
Tu, Shu-Jiang,Gao, Yuan,Guo, Cheng,Shi, Daqing,Lu, Zaisheng
, p. 2137 - 2141 (2002)
A series of 2-amino-5,6,7,8-tetrahydro-5-oxo-4-aryl-7,7-dimethyl-4H-benzo-[b]-pyran-3 -carbonitrile were synthesized by reaction of benzylidenemalononitrile derivatives and 5,5-dimethyl-1,3-cyclo-hexanedione under microwave irradiation without catalyst an
Triethylammonium acetate [TEAA]: An efficient catalyst for one pot synthesis of tetrahydro-4H-chromene derivatives
Balaskar, Ravi,Gavade, Sandip,Mane, Madhav,Pabrekar, Pramod,Shingare, Murlidhar,Mane, Dhananjay
, p. 282 - 286 (2011)
An efficient and convenient approach towards the synthesis of series of tetrahydro-4H-chromenes via one pot three component coupling reactions of aldehyde, dimedone and malononitrile carried out at room temperature in presence of triethylammonium acetate
Synthesis and X-ray crystal structures of polyfunctionalized 4H-chromene derivatives via tricomponent reaction with Knoevenagel adducts as intermediates in aqueous medium
Diniz, Luan Farinelli,Ellena, Javier,Jimenez, David Esteban Quintero,Porto, André Luiz Meleiro,Zanin, Lucas Lima,de Jesus, Matheus Pereira
, (2021)
Chromenes and their derivatives are an important class of compounds known for their biological properties. In this study, synthetic methodologies were described to obtain 4H-chromene derivatives. Two routes were investigated, the first being a bicomponent
Catalyst-free cascade synthesis of densely functionalized chromenes in water
Bhat, Subrahmanya Ishwar
, p. 2532 - 2536 (2019)
An expeditious and environmental friendly, general protocol has been developed for the synthesis of 2-amino-3-cyano-4H-chromenes via cascade Knoevenagel-Michael-intramolecular cyclization in water. Pure solid products were obtained by simple filtration technique. The aqueous catalyst-free reactions lead to high product yield at room temperature.
An efficient synthesis of Tetrahydrobenzo[b]pyran derivatives using sulfonic acid functionalized silica as an efficient catalyst
Ziarani, Ghodsi Mohammadi,Abbasi, Alireza,Badiei, Alireza,Aslani, Zeinab
, p. 293 - 299 (2011)
Tetrahydrobenzo[b]pyran derivatives were efficiently synthesized by the reaction of appropriated aromatic aldehydes, malononitrile and dimedone in the presence of SiO2-Pr-SO3H as a nanoporous and recoverable solid acid catalyst, in good to excellent yield
Silica-supported phosphomolybdic acid-catalyzed efficient synthesis of 1,8-dioxooctahydroxanthene and tetrahydrochromene derivatives
Das, Biswanath,Krishnaiah, Martha,Laxminarayana, Keetha,Damodar, Kongara,Kumar, Duddukuri Nandan
, p. 1000 - 1001 (2008)
Silica-supported phosphomolybdic acid was found to be an efficient heterogeneous catalyst for the synthesis of 1,8-dioxooctahy-droxanthenes from aldehydes and dimedone and of tetrahydrochromenes from the same reaction mixture along with malononitrile. The
Solvent Selective Polyacrylonitrile Fiber as a Recyclable Catalyst for the Knoevenagel-Michael Reaction in Water
Li, Pengyu,Yang, Yu,Wu, Xueling,Lu, Jiali,Hu, Lingrui,Chen, Weihua,Zhang, Wenqin
, p. 43 - 54 (2022)
Heterogeneous catalysis is an important branch of sustainable chemistry. In this work, a series of polyacrylonitrile fiber (PANF) fiber catalysts (PANF-E, PANF-EDs, and PANF-D) with different catalytic micro-environments are developed and characterized by
A recyclable and highly effective ZnO-beta zeolite as a catalyst for one-pot three-component synthesis of tetrahydrobenzo[b]pyrans
Katkar, Santosh Shriram,Lande, MacHhindra Karbhari,Arbad, Balasaheb Ramrao,Gaikwad, Suresh Tukaram
, p. 199 - 202 (2011)
4H-Benzo[b]pyrans was synthesized under reflux condition in ethanol via condensation of benzaldehyde, malononitrile and dimedone with ZnO-beta zeolite as an inexpensive and effective catalyst. The key features of the reported protocols are good to excelle
Magnetic Graphitic Carbon Nitride-Catalyzed Highly Efficient Construction of Functionalized 4 H -Pyrans
Azizi, Najmedin,Ahooie, Tahereh Soleymani,Hashemi, Mohammad Mahmodi,Yavari, Issa
, p. 645 - 649 (2018)
A high-yielding, practical, efficient, and environmentally benign one-pot multicomponent synthesis of functionalized 2-amino-4 H -pyrans from β-dicarbonyl compounds, malononitrile, and aldehydes is presented. Good to excellent yields were obtained under m
Electrogenerated base-promoted synthesis of tetrahydrobenzo[b]pyran derivatives
Fotouhi, Lida,Heravi, Majid M.,Fatehi, Azadeh,Bakhtiari, Khadijeh
, p. 5379 - 5381 (2007)
An efficient and convenient synthesis of tetrahydrobenzo[b]pyrans is described, using an electrogenerated base of the anion of malononitrile in a one-pot, three component condensation of an aromatic aldehyde, an active methylene compound and dimedone. The reaction is carried out at room temperature in acetonitrile with the use of a sacrificial magnesium anode in a single-compartment cell.
Silica-modified magnetite Fe3O4 nanoparticles grafted with sulfamic acid functional groups: an efficient heterogeneous catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-one and tetrahydrobenzo[b]pyran derivatives
Azarifar, Davood,Badalkhani, Omolbanin,Abbasi, Younes
, p. 656 - 673 (2016)
Silica-modified magnetite-polyoxometalates functionalized with sulfamic acid groups as hybrid nanoparticles were prepared by sulfonation of diamine-functionalized propyl group grafted on the magnetic silica-coated Fe3O4 nanoparticles
Free-ZnO nanoparticles: A mild, efficient and reusable catalyst for the one-pot multicomponent synthesis of tetrahydrobenzo[b]pyran and dihydropyrimidone derivatives
Banerjee, Subhash,Saha, Arijit
, p. 4170 - 4175 (2013)
Free-ZnO nanoparticles have been employed as a mild, efficient and reusable catalyst for the one-pot multicomponent synthesis of tetrahydrobenzo[b]pyrans and dihydropyrimidones in excellent yields. The ZnO NPs were recycled and reused eight times.
One-pot synthesis of tetrahydrobenzo[b]pyran derivatives catalyzed by amines in aqueous media
Yu, Li-Qin,Liu, Fei,You, Qi-Dong
, p. 77 - 82 (2009)
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A novel, efficient, and recyclable biocatalyst for Michael addition reactions and its iron(iii) complex as promoter for alkyl oxidation reactions
Khalil, Khaled D.,Ibrahim, Enas I.,Al-Sagheer, Fakhreia A.
, p. 1410 - 1416 (2016)
Chitosan-g-poly(2-cyano-1-(pyridin-3-yl)allyl acrylate) (Cs-g-PCPA), having a grafting percentage (G%) of 64%, was prepared and was then subjected to complexation with iron(iii) (Cs-g-PCPA/Fe(iii)). The results of the catalytic studies demonstrated that Cs-g-PCPA serves as an efficient, recyclable and eco-friendly, basic catalyst for Michael addition reactions, which produce adducts in high yields under mild conditions. Moreover, a Cs-g-PCPA-supported iron(iii) complex was prepared and was then characterized by using FESEM, XRD, TGA, and XPS. In addition, the EDS plot of the Fe(iii) chelate confirms the presence of a relatively high amount (13%) of Fe(iii). The Cs-g-PCPA (G% = 64)-supported iron(iii) complex (Cs-g-PCPA/Fe(iii)) in the presence of H2O2 can be used to oxidize methyl pyridazinyl carbonitriles to form the corresponding fused furan derivatives efficiently. These polymeric catalysts are stable such that they can be recycled and reused more than five times without losing their catalytic activity.
H5BW12O40 as a green and efficient homogeneous but recyclable catalyst in the synthesis of 4H-Pyrans via multicomponent reaction
Heravi, Majid M.,Mirzaei, Masoud,Beheshtiha, Seyed Yahya Shirazi,Zadsirjan, Vahideh,Mashayekh Ameli, Fatemeh,Bazargan, Maryam
, (2018)
Keggin-type heteropolyacid, H5BW12O40 (BWA) with a higher negative charge and stronger Br?nsted acidity comparing to Si and P derivatives was used as an efficient, green, and reusable catalyst in a three-component reaction
Composite of magnetic carbon quantum dot-supported ionic liquid and Cu-BDC (CCDC no. 687690) MOF: A triple catalytic composite for chemical transformations
Koohestani, Fatemeh,Sadjadi, Samahe
, (2022/01/19)
A novel magnetic triple composite was synthesized through immobilization of DABCO-based ionic liquid on magnetic carbon quantum dot, followed by conjugation of the resultant compound with a copper-based metal-organic framework (CCDC no. 687690). The as-pr
Catalyst-free UV365-assisted synthesis of pyran annulated heterocyclic scaffolds and evaluation of their antibacterial activities
Dutta, Arup,Rahman, Noimur,Kumar, John Elisa,Rabha, Jintu,Phukan, Tridip,Nongkhlaw, Rishanlang
supporting information, p. 263 - 278 (2020/11/03)
A convenient and eco-friendly, one-pot synthetic protocol for pharmaceutically important pyran-based heterocyclic compounds is repeated herein. The reactions were carried out at room temperature in a water–ethanol solvent mixture under direct irradiation
