1539-44-2Relevant articles and documents
Aromatization of Hantzsch 1,4-dihydropyridines with I2-MeOH
Yadav,Subba Reddy,Sabitha,Kiran Kumar Reddy
, p. 1532 - 1534 (2000)
4-Alkyl or aryl substituted Hantzsch 1,4-dihydropyridines are aromatized to the corresponding pyridines in high yields by iodine in refluxing methanol. The method tolerates several substituents such as alkyl, benzyl, aryl and heterocyclic groups present i
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Kurbatova,Kurbatov
, (1979)
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Silica gel-supported bis(trimethylsilyl) chromate: Oxidation of 1,4-dihydropyridines to pyridines
Heravi, Majid M.,Derikvand, Fatemeh,Oskooie, Hossein A.,Shoar, Rahim Hekmat
, p. 77 - 82 (2006)
An efficient and convenient method for the oxidation of 1,4-dihydropyridines mediated by silica gel-supported bis(trimethylsilyl) chromate in refluxing CH2Cl2 is reported. Copyright Taylor & Francis LLC.
Ultrasound-Assisted Heterogeneous Oxidation of 1,4-Dihydropyridines
Abdoli-Senejani,Karami
, p. 274 - 281 (2020)
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N,N′-ethylene-bis(benzoylacetoniminato) copper (II), Cu(C 22H22N2O2), a new reagent for aromatization of Hantzsch 1,4-dihydropyridines
Dehghanpour, Saeed,Heravi, Majid M.,Derikvand, Fatemeh
, p. 433 - 438 (2007)
A variety of Hantzsch 1,4-dihydropyridines were oxidized to their corresponding pyridines in high yields in the presence of Cu(C 22H22N2O2) in refluxing acetic acid.
Aromatization of Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines with HIO3 and I2O5 in water
Chai, Lingzhi,Zhao, Yankai,Sheng, Qiuju,Liu, Zhong-Quan
, p. 9283 - 9285 (2006)
Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines were converted to the corresponding pyridines and pyrazoles efficiently by the treatment of a catalytic amount of HIO3 or I2O5 in water.
Aromatization of hantzsch 1,4-dihydropyridines using barium manganate
Memarian,Sadeghi,Momeni
, p. 2241 - 2244 (2001)
Barium manganate has been used as an inexpensive and convenient reagent for efficient oxidation of a variety of 1,4-dihydropyridine derivatives to pyridine derivatives in refluxing benzene with excellent yields.
Oxidative Aromatization of 1,3,5-Trisubstituted Pyrazolines and Hantzsch 1,4-Dihydropyridines by Pd/C in Acetic Acid
Nakamichi, Natsuki,Kawashita, Yuka,Hayashi, Masahiko
, p. 3955 - 3957 (2002)
(Equation Presented) 1,3,5-Trisubstituted pyrazolines and Hantzsch 1,4-dihydropyridines were converted to the corresponding pyrazoles and pyridines effectively by the treatment of a catalytic amount of Pd/C in acetic acid.
Aromatization of 1,4-Dihydropyridines by Clay-Supported Metal Nitrates
Balogh, Maria,Hermecz, Istvan,Meszaros, Zoltan,Laszlo, Pierre
, p. 2270 - 2272 (1984)
1,4-Dihydropyridines can be aromatized under very mild conditions by K 10 clay-supported ferric and cupric nitrates.
Zeobis, a versatile reagent for the fast aromatization of Hantzsch 1,4-Dihydropyridines
Heravi, Majid M.,Bakhtiari, Khadijeh,Oskooie, Hossein A.,Hekmatshoa, Rahim
, p. 209 - 212 (2006)
Bismuth nitrate supported onto HZSM-5 zeolite (zeobis) has been found to be an efficient and selective reagent for the oxidation of Hantzsch 1,4-Dihydropyridines to the corresponding pyridine derivatives in excellent yields.
An efficient aerobic oxidative aromatization of Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines
Han, Bing,Liu, Zhengang,Liu, Qiang,Yang, Li,Liu, Zhong-Li,Yu, Wei
, p. 2492 - 2496 (2006)
4-Substituted Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines were oxidized to the corresponding pyridines and pyrazoles, respectively, in high yields by molecular oxygen in the presence of catalytic amount of N-hydroxyphthalimide (NHPI
Synthesis and characterization of bis-triazolyl-pyridine derivatives as noncanonical dna-interacting compounds
Amato, Jussara,Biroccio, Annamaria,Brancaccio, Diego,Carotenuto, Alfonso,De Tito, Stefano,Di Porzio, Anna,Galli, Ubaldina,Iaccarino, Nunzia,Iachettini, Sara,Marzano, Simona,Pagano, Bruno,Randazzo, Antonio,Santoro, Federica,Tron, Gian Cesare,Zizza, Pasquale
, (2021/11/05)
Besides the well-known double-helical conformation, DNA is capable of folding into various noncanonical arrangements, such as G-quadruplexes (G4s) and i-motifs (iMs), whose occurrence in gene promoters, replication origins, and telomeres highlights the br
Trinuclear cis-dioxidomolybdenum(VI) complexes of compartmental C3 symmetric ligands: Synthesis, characterization, DFT study and catalytic application for hydropyridines (Hps) via the Hantzsch reaction
Avecilla, Fernando,Gupta, Puneet,Maurya, Mannar R.,Tomar, Reshu
supporting information, (2020/06/08)
Trinuclear cis-dioxidomolybdenum(VI) complexes of the type [{MoVIO2(MeOH)}3L1-7] (1–7) have been synthesized using tris(H2ONO) donor ligands [H6L1-7 (I–VII)] assembled from benzene-1,3,5-tricarbohydrazide (bthz) and the corresponding salicylaldehyde (sal). All the ligands and the complexes were characterized by numerous techniques, such as FT-IR, UV–visible, NMR (1H and 13C) spectroscopy, electrochemical study, elemental analysis, thermogravimetric study and single crystal X-ray diffraction of the ligand III and complexes 1 and 5. In the presence of H2O2 as an oxidant, these complexes show excellent catalytic potential towards the one-pot three-components [ethyl acetoacetate, benzaldehyde (or its derivatives) and ammonium acetate] dynamic covalent assembly in the Hantzsch reaction. Under solvent free conditions, as high as 98% conversion along with 100% selectivity towards diethyl 2,6-dimethyl-4-phenyl-1,4-dihydropyridine-3,5-dicarboxylate (1,4-DHP) has been achieved in 1 h. Although solvents do not improve the conversion, they do influence the selectivity of the products. With the elapse of time, the conversion of dihydropyridine to the diethyl 2,6-dimethyl-4-phenylpyridine-3,5-dicarboxylate derivative occurs and completes in ca. 10 h with a distinct color change, showing the importance of the catalysts. Efforts have been made to provide suitable reaction pathways for the catalytic reaction based on spectroscopic and density functional theory studies.
