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Unsymmetrical three-carbon condensations with dimedone
Chemistry of Heterocyclic Compounds, 1967Condensing together equimolecular amounts of dimedone, an aldehyde, and s-aminocrotonic ester gives derivatives of 3-ethoxycarbonyl-2, 7, 7-trimethyl-5-keto-1, 4, 5, 6, 7, 8-hexahydroquinoline (IVa-c); of these, compounds IVb and IVc can be oxidized by chromic anhydride to 3-ethoxycarbonyl-2, 7, trimethyl-5-keto-5, 6, 7, 8-tetrahydroquinolines (Vb, c).
E. I. Stankevich +2 more
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Spectrophotofluorimetric determination of aldehydes with dimedone and other reagents
Mikrochimica Acta, 1968Two new reagents, dimedone and 1,3-cyclohexanedione, are introduced for the fluorimetric determination of aliphatic aldehydes. Six fluorimetric methods for the determination of formaldehyde and other aldehydes have been compared. Of the selective methods for the determination of formaldehyde the J-acid procedure is recommended when a high order of ...
E, Sawicki, R A, Carnes
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Formaldehyde, as its dimedone adduct, fromAscophyllum nodosum
Journal of Applied Phycology, 1996Formaldehyde, as its dimedone adduct (formaldemethone), has been isolated fromAscophyllum nodosum and characterised by thin-layer and overpressured layer chromatography, and from proton nuclear magnetic resonance spectroscopic and electron impact mass spectrometric data. Formaldemethone was detected in extracts of both fresh and dry alga.
Ernö Tyihák +4 more
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ChemInform Abstract: VILSMEIER REACTION WITH DIMEDONE
Chemischer Informationsdienst, 1979AbstractDimedon (I) liefert unter den Bedingungen einer Vilsmeier‐Reaktion das vinyloge Säurechlorid (II), den Aldehyd (III) und Dialdehyd (IV) in etwa gleicher Ausbeute.
M. PULST, B. HOLLBORN, M. WEISSENFELS
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Studies on Sulfoxide Rearrangement: Synthesis of Dimedone‐Anellated Heterocycles.
ChemInform, 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
K.C Majumdar, S.K Samanta
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Reaction of acyl(aroyl) isocyanates with dimedon
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1981The benzoyl and trichloroacetyl isocyanates react with dimedon to give the [4 + 2]-cycloadducts and the O- and C-addition products, whereas trifluoroacetyl isocyanate reacts to give the acid azomethine. © 1982 Plenum Publishing Corporation.
Arbuzov B., Zobova N., Dautova L.
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ChemInform Abstract: PHOTOOX. VON DIMEDON
Chemischer Informationsdienst. Organische Chemie, 1970AbstractPhoto‐Oxidation des aus Dimedon (I) erhältlichen Anions (II) liefert den Dicarbonsäurehalbester (III), der zu (IV) umgewandelt wird.
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Greener approach toward the generation of dimedone derivatives
Synthetic Communications, 2017The use of dimedone in green chemistry has been described for the synthesis of selective heterocyclic motifs which are both pharmacologically and industrially important.
Deepika Arora +3 more
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Detection and spectrophotometric determination of cobalt with dimedone dioxime
Talanta, 1974Dimedone dioxime forms coloured complexes only with cobalt, nickel and copper ions in alkaline solution. Acidification and solvent extraction enables cobalt (1-50 mug) to be determined spectrophotometrically without interference. A specific spot test for cobalt is based on the same reaction.
R, Belcher, S A, Ghonaim, A, Townshend
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Enhydrazine, 4 Die Umsetzung von Dimedon mit Hydrazonen
Chemische Berichte, 1972AbstractDimedon bildet bei Gegenwart von p‐Toluolsulfonsäure mit araliphatischen oder aromatischen Hydrazonen Enhydrazone wie 4, 6, 8 und 10, die zu den Enhydrazinen 12, 13 und 15 hydriert werden können. Bei milder Säurekatalyse entstehen aus Dimedon und (auch aliphatischen) Hydrazonen über die Stufe der Hexahydro‐indazolinone‐(4) wie 25–28 die ...
Wolfgang Sucrow +2 more
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