Results 181 to 190 of about 4,172 (223)

ChemInform Abstract: PHOTOOX. VON DIMEDON

Chemischer Informationsdienst. Organische Chemie, 1970
AbstractPhoto‐Oxidation des aus Dimedon (I) erhältlichen Anions (II) liefert den Dicarbonsäurehalbester (III), der zu (IV) umgewandelt wird.
openaire   +1 more source

Greener approach toward the generation of dimedone derivatives

Synthetic Communications, 2017
The 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, Jaya Dwivedi, Sudesh Kumar, Dharma Kishore   +3 more
openaire   +1 more source

Detection and spectrophotometric determination of cobalt with dimedone dioxime

Talanta, 1974
Dimedone 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
openaire   +2 more sources

Enhydrazine, 4 Die Umsetzung von Dimedon mit Hydrazonen

Chemische Berichte, 1972
AbstractDimedon 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, Marion Slopianka, Athene Neophytou   +2 more
openaire   +1 more source

The reaction of maleic anhydride with dimedone

Journal of the Chemical Society C: Organic, 1968
Two compounds arising from the acid-catalysed condensation of maleic anhydride with dimedone are 3-carboxymethyl-5,6,7,8-tetrahydro-4-hydroxy-7,7-dimethyl-5-oxonaphthalene-1,2-dicarboxylic anhydride (4) and α-(4,4-dimethyl-2,6-dioxocyclohexyl)succinic acid (8).
openaire   +1 more source

ChemInform Abstract: REACTIONS OF DIMEDONE WITH SULFUR CHLORIDES

Chemischer Informationsdienst, 1982
AbstractDimedon (I) reagiert mit Schwefelmonochlorid, jedoch auch anderen Schwefelchloriden, zu den Folgeprodukten (II) bis (IV).
I. W. J. STILL, G. W. KUTNEY
openaire   +1 more source

Non-cytotoxic Dimedone Derivatives: Structure, Antiradical and UV Protective Studies

Drug Research, 2013
Dimedone derivatives (L1-L4) with methyl substitution at the ortho, para and meta positions were synthesized and their anti-radical, photoreactive and photostability activities were evaluated. All compounds are characterized by spectroscopic techniques and by single crystal X ray diffraction.
P V, Joshi, K S, Mundhe, A A, Khan, R L, Gawade, N R, Deshpande, R V, Kashalkar, V G, Puranik   +6 more
openaire   +2 more sources

Relationship Between Dimedone Concentration and Formaldehyde Captured in Plant Tissues

Acta Biologica Hungarica, 1998
In different parts of water-melon plants (Citrullus vulgaris L.) formaldehyde (HCHO), in dimedone adduct form (formaldemethone), and fully N-methylated substances were identified and determined by OPLC as well as HPLC, capillary GC and GC-MS methods using authentic substances.
E, Sárdi, E, Tyihák
openaire   +2 more sources

The Reaction of Aromatic Dialdehyde with Dimedone under Microwave Irradiation.

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Shujiang Tu, Yuan Gao, Chunbao Miao, Songlei Zhu, Tuanjie Li, Xiaojing Zhang, Daqing Shi   +6 more
openaire   +1 more source

Synthese und einige Umsetzungen des 2‐Hydroxy‐dimedons

Chemische Berichte, 1959
Abstract2‐Hydroxy‐dimedon, dargestellt durch Hydrolyse des 2‐Diazo‐dimedons mit Schwefelsäure, besser unter Zusatz von Kupferpulver, erweist sich als ein aci‐Redukton. Aus seiner Sublimierbarkeit und Löslichkeit in gesätt. Kohlenwasserstoffen wird auf eine Chelat‐Struktur geschlossen.
Bernd Eistert, Horst Elias, Ehrenfried Kosch, Rudolf Wollheim   +3 more
openaire   +1 more source