Journal ArticleDOI
Oxidative aromatization of 1,3,5-trisubstituted pyrazolines and Hantzsch 1,4-dihydropyridines by Pd/C in acetic acid.
TLDR
1,3,5-Trisubstituted pyrazolines and Hantzsch 1,4-dihydropyridine were converted to the corresponding pyrazoles and pyridines effectively by the treatment of a catalytic amount of Pd/C in acetic acid.About:
This article is published in Organic Letters.The article was published on 2002-10-03. It has received 222 citations till now. The article focuses on the topics: Acetic acid & Aromatization.read more
Citations
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From 2000 to mid-2010: a fruitful decade for the synthesis of pyrazoles.
Journal ArticleDOI
Metal-Free Multicomponent Syntheses of Pyridines
Journal ArticleDOI
Synthesis of Dihydropyridines and Pyridines from Imines and Alkynes via C−H Activation
TL;DR: A convenient one-pot C-H alkenylation/electrocyclization/aromatization sequence has been developed for the synthesis of highly substituted pyridine derivatives from alkynes and alpha,beta-unsaturated N-benzyl aldimines and ketimines that proceeds through dihydropyridine intermediates.
Journal ArticleDOI
Journey describing applications of oxone in synthetic chemistry
TL;DR: This paper presents a probabilistic analysis of the response of nanoporous materials to high-performance liquid chromatography and shows clear trends in the number of particles that adhere to each other and in the geometry of the molecule.
Journal ArticleDOI
Direct and practical synthesis of 2-arylbenzoxazoles promoted by activated carbon.
TL;DR: 2-Arylbenzoxazoles were directly synthesized from substituted 2-aminophenols and aldehydes in the presence of activated carbon (Darco KB) in xylene under an oxygen atmosphere.
References
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Journal ArticleDOI
Oxidation of 4-aryl- and 4-alkyl-substituted 2,6-dimethyl-3,5-bis(alkoxycarbonyl)-1,4-dihydropyridines by human liver microsomes and immunochemical evidence for the involvement of a form of cytochrome P-450.
R H Böcker,F P Guengerich +1 more
TL;DR: The results indicate that P- 450NF (or closely related enzyme forms) is responsible for the oxidation of these nifedipine-related compounds in human liver microsomes and that metabolism is highly dependent upon 4-substitution; with alkyl substituents, radicals are postulated to leave P-450NF to attack other proteins.
Journal ArticleDOI
The Hantzsch Reaction. I. Oxidative Dealkylation of Certain Dihydropyridines
Bernard Loev,Kenneth M. Snader +1 more
Journal ArticleDOI
Oxidation with metal oxides—II : Oxidation of chalcone phenylhydrazones, pyrazolines, o-aminobenzylidine anils and o-hydroxy benzylidine anils with manganese dioxide
TL;DR: Several chalcone phenylhydrazones and pyrazolines have been oxidized with manganese dioxide to give pyrazoles in good yields as discussed by the authors, including p-nitrobenzylidene-o-aminophenol.
Journal ArticleDOI
Rapid, high-yield oxidation of Hantzsch-type 1,4-dihydropyridines with ceric ammonium nitrate.
TL;DR: In this paper, a title reaction gives pyridine derivatives corresponding to the title compounds in excellent yields, which are then used to synthesize pyridines. But they are not suitable for use in chemical synthesis.
Journal ArticleDOI
Ultrasound-promoted aromatization of hantzsch 1,4-Dihydropyridines by clay-supported cuptic nitrate
TL;DR: In this paper, the effects of sonication were discussed and the scope of that procedure and its effects on sonication effects were discussed, as well as the effect of the sonication effect on the results.
Related Papers (5)
Rapid, high-yield oxidation of Hantzsch-type 1,4-dihydropyridines with ceric ammonium nitrate.
Oxidation of 4-aryl- and 4-alkyl-substituted 2,6-dimethyl-3,5-bis(alkoxycarbonyl)-1,4-dihydropyridines by human liver microsomes and immunochemical evidence for the involvement of a form of cytochrome P-450.
R H Böcker,F P Guengerich +1 more