Journal ArticleDOI
Facile Synthesis of 7‐Methoxy‐2‐aryl‐3‐phenyl/or‐H‐8‐[2‐(4,6‐dimethyl‐3,5‐dicarbethoxy‐pyridyl)]‐4H‐1‐benzopyran‐4‐ones
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TLDR
Condensation of 8.formyl, 7.methoxy, 2.7methoxyl, 3.3methioxyl, 4.5methoxide, and 3.1methylbenzopyran-4.4.1.About:
This article is published in Synthetic Communications.The article was published on 2007-03-09. It has received 8 citations till now. The article focuses on the topics: Benzopyran & Aryl.read more
Citations
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Journal ArticleDOI
Rhodium-catalyzed oxidative coupling between salicylaldehydes and internal alkynes with C-H bond cleavage to produce 2,3-disubstituted chromones.
TL;DR: A direct oxidative coupling of salicylaldehydes with internal alkynes proceeds efficiently with cleavage of the aldehyde C--H bond to produce the corresponding chromone derivatives.
Journal ArticleDOI
A revisit to the Hantzsch reaction: Unexpected products beyond 1,4-dihydropyridines
TL;DR: In this article, a green and efficient one-pot three-component synthesis of 2-aryl-pyridines in good to excellent yields has been reported, which initially involved the formation of 1,2-dihydropyridine intermediates via reaction of a variety of aromatic aldehydes with ethyl (methyl) acetoacetate and ammonium acetate, under solvent-, catalyst-and heat-free (at room temperature) conditions, followed by air oxidation for 72 hours.
Journal ArticleDOI
The synthesis of angular heteroarenochromones based on 7-hydroxy-8-carbonylchromones
TL;DR: In this article, a review highlights advanced strategies to the synthesis of the chromones annulated with O and N -containing heterocycles at C(7)-C(8) bond.
Book ChapterDOI
Chapter 6.1: Six-Membered Ring Systems: Pyridine and Benzo Derivatives
TL;DR: The Hantzsch synthesis of pyridine is a cyclocondensation method of considerable importance as discussed by the authors, which classically involves the condensation of four components, including two molecules of β-carbonyl compounds, an aldehyde, and ammonia (or an equivalent) to form 1,4-dihydropyridines, which can be aromatized into pyridine.
Journal ArticleDOI
Facile Synthesis of 9-Acetyl/Formyl/Cyano-Substituted Pyrano[2,3-f]flavones and Chromones Using the Baylis–Hillman Reaction
TL;DR: Condensation of 8-formyl-7-hydroxyflavones (2a-f) and 8-formsyl7hydroxy-2-(2′-furyl)-3-methylchromone (2g) with methyl vinyl ketone (3), acrolein (4), and acrylonitrile (5) in the presence of diazabicyclo[2.2]octane (DABCO) under an N2 atmosphere at room temperature using Baylis-Hillman reaction conditions afforded 9-acetyl/formyl
References
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282. Reactions between hexamethylenetetramine and phenolic compounds. Part II. Formation of phenolic aldehydes. Distinctive behaviour of p-nitrophenol
J. C. Duff,E. J. Bills +1 more
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