Journal ArticleDOI
Studies on antianaphylactic agents—III
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By the application of the Vilsmeier-Haack reaction to various o-hydroxyacetophenone derivatives, 4-oxo-4H-1-benzopyran-3-carboxaldehydes were synthesized in one step as discussed by the authors.About:
This article is published in Tetrahedron.The article was published on 1974-01-01. It has received 175 citations till now. The article focuses on the topics: Fragmentation (mass spectrometry) & Mass spectrum.read more
Citations
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Catalytic Effects in Baylis–Hillman Reactions of Chromone-3-carbaldehydes with Acrylonitrile and Methyl Acrylate
Duduzile M. Molefe,Perry T. Kaye +1 more
TL;DR: In this article, the effects of various catalysts, the solvent system, and the temperature on the efficiency and chemoselectivity of reactions of a series of chromone-3-carbaldehydes with acrylonitrile and methyl acrylate are discussed.
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NiII and CoII binary and ternary complexes of 3-formylchromone: spectroscopic characterization, antimicrobial activities, docking and modeling studies
TL;DR: In this paper , 3-formylchromone (L) with Ni(ii and Co(ii) ions having different anions (acetate, perchlorate, nitrate, and chloride) yielded a series of binary and ternary octahedral complexes with the general formula [MLnL′mXy(S)a]Zy·bS, where M = Ni or Co, n = 1-3, L′ = auxiliary ligand = 8-hydroxyquinoline or 1,10-phenanthroline, m = 1 or 2, X = acetate or chloride, S = H2O or MeOH, a = 0-2.
Journal ArticleDOI
An Overview of Recent Advances in the Catalytic Synthesis of Substituted Pyrans
TL;DR: The structural importance of substituted pyrans has elicited a huge upsurge in the field of synthesis and biology and different synthetic approaches of 4H-chromene scaffolds have been discussed systematically to emphasize their significance in the scientific world as mentioned in this paper .
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An experimental and computational study of new spiro-barbituric acid pyrazoline scaffolds: restricted rotation vs. annular tautomerism
TL;DR: A regioselective [3+2] cycloaddition (32CA) reaction to synthesize unsymmetric spiro-barbituric pyrazolines containing a chromone or phenolic pyrazole moiety was achieved, providing good to excellent yields.
References
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Journal ArticleDOI
3‐Acylchromone. XV. Mitt. über Untersuchungen an γ‐Pyronen
Fritz Eiden,H. Haverland +1 more
TL;DR: In 2-Stellung unsubstituierte 3-Acyl-chromone wurden aus 2-Hydroxy-ω-acyl-acetophenonen durch Reaktion with Orthoameisensaure-triathylester und Acetanhydrid oder aus 1-hydroxy-α-formylacetophenon and Acetanehydrid/Natriumacetat dargestellt as mentioned in this paper.
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Synthetic analogs of cortical hormones. i. homogentisic acid and ,2,5-trihydroxyacetophenone derivatives from 2,5-diacetoxy--diazoacetophenone
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The reactions of 2,2‐difluoro‐4‐methylnaphtho[l,2‐e]‐1,3,2‐dioxaborin and its [2,1‐e]isomer with N,N‐dimethylformamide
TL;DR: In this paper, the title compounds react with dimethylformamide in acetic anhydride to give dimethylamino-vinyl derivatives which, on treatment with base, yield benzochroman-4-ones.
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Pharmacological actions of baicalin and baicalein
TL;DR: In this paper, Baicalin and Baicalein, components of the drug, were investigated on active anaphylactic reaction in guinea pig, and the results obtained were compared with those of rutin, methylhesperidin and quercetin.