Journal ArticleDOI
Synthesis of acetylenic β-diketones and their conversion into 4H-pyran-4-ones, pyrazoles, and 1-hydroxy-4-pyridones
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TLDR
In this paper, a simple method for the synthesis of acetylenic β-diketones is described, which can be cyclized to the corresponding 4H-pyran-4-ones with acids.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 1979-06-01. It has received 20 citations till now. The article focuses on the topics: Pyrazole & Pyran.read more
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Asymmetric transfer hydrogenation of functionalized acetylenic ketones.
Zhijia Fang,Martin Wills +1 more
TL;DR: A systematic study of the asymmetric transfer hydrogenations of functionalized acetylenic ketones and diketones has been completed, together with a total synthesis of (S,S)-(-)-yashabushidiol B.
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Gamma,delta-unsaturated beta-diketones by acylation of ketones.
TL;DR: In this paper, Gamma,delta-unsaturated beta-diketones have been prepared by the acylation of ketones with N-acylbenzotriazoles of various aliphatic and aromatic alpha,beta-unaturated carboxylic acids.
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A new synthesis of pyrazolo[1,5-c]pyrimidines from acetylenic β-diketones
TL;DR: The pyrazolopyrimidinethiones give with certain electrophiles the respective 3-substituted 7-thiones as discussed by the authors, whose oxidation affords the corresponding disulfide.
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β-Diketones bearing electron-donating chromophores and a novel β-triketone: synthesis and reversible fluorescence behavior
TL;DR: Saturated and unsaturated β-diketones bearing 4-N,N-dimethylaminophenyl substituent and a novel β-triketone were synthesized in this article.
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Synthesis and reactions of 3‐iodo‐4H‐pyran‐4‐ones
TL;DR: In this article, 3-Iodo-4H-pyran-4-thiones have been synthesised in excellent yield by the reaction of acetylenic β-diketones with iodine monochloride and were converted into the corresponding 4H-Pyran 4thione.
References
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Journal ArticleDOI
Syntheses and properties of H-1,2,3-triazoles
TL;DR: In this article, a nucleophilic attack of sodium azide on activated acetylenes in dimethylformamide was described, and twenty new H-1,2,3-triazoles (T) were readily synthesized.
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Syntheses with diacetylenic ketones: 5-Membered rings by anti-michael addition
TL;DR: In this paper, a variety of products deriving from attack at the ketone and/or one or both triple bonds were derived from synthesis with diphenylethynylylketone and di-n-hexynyl ketone.
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Rearrangements of 2-pyrones and pyran-2-thiones involving 1,5-sigmatropic hydrogen shifts
W. H. Pirkle,W. V. Turner +1 more
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