Journal ArticleDOI
Reactions between 4‐hydroxy‐6‐methyl‐2‐pyrone and aldehydes both in the absence and the presence of added thiols
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TLDR
Aldehydes react with 4-hydroxy-6-methyl-2-pyrone, 2, under Knoevenagel conditions to afford very elec-trophilic intermediates, which can be trapped by more 2 or thiols to give dilactones 3 or monolactones 4 as discussed by the authors.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 1982-03-01. It has received 32 citations till now. The article focuses on the topics: Knoevenagel condensation.read more
Citations
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Journal ArticleDOI
Natural and synthetic 2H-pyran-2-ones and their versatility in organic synthesis☆
Atul Goel,Vishnu Ji Ram +1 more
TL;DR: An overview of the natural presence and development of the chemistry of the 2 H -pyran-2-one ring system is delineated in this article, where 363 references are provided.
Book ChapterDOI
1.11 – The Knoevenagel Reaction
Lutz F. Tietze,Uwe Beifuss +1 more
TL;DR: For example, Knoevenagel et al. as mentioned in this paper showed that the reaction of benzaldehyde and ethyl acetoacetate in the presence of piperidine gives the bis adduct at room temperature and at 0°C the benzylidene-1,3-di- carbonyl.
Book ChapterDOI
Dehydroacetic Acid, Triacetic Acid Lactone, and Related Pyrones
TL;DR: Preparation of pyrones dealt with in the chapter can be achieved by modifying previously existing pyrones or by cyclizing open-chain compounds.
Journal ArticleDOI
4-amino-6-methyl-2-pyran-2-one. Preparation and reactions with aromatic aldehydes
TL;DR: In this article, aminopyrone was synthesized by reaction of 4-amino-6-methyl-2 H -pyran-2-one with aromatic aldehydes.
Journal ArticleDOI
The reactivity of 4-hydroxy-6-methyl-2-pyrone towards aliphatic saturated and α,β-unsaturated aldehydes
TL;DR: In this paper, the title pyrone with cinnamaldehyde occurs at the carbonyl group of the aldehyde and the nonisolated intermediates can undergo transformations in at least five different ways.
References
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Journal ArticleDOI
Pyrone studies—I
TL;DR: In this article, the use of pyrones for the biogenetic-type synthesis of phenolic compounds was investigated and some control over the direction of cyclization of the intermediate β-triketo ester chain was demonstrated.
Journal ArticleDOI
Untersuchungen über die Bestandteile der Kawawurzel, XII. Mitteil.: Über Yangonalacton und Triacetsäure
W. Borsche,B. K. Blount +1 more