Results 161 to 170 of about 4,172 (223)
Magnetically recoverable Fe<sub>3</sub>O<sub>4</sub>@chitosan@Ni<sub>2</sub>B: a bio-based catalyst for one-pot green and efficient synthesis of tetrahydrobenzo[<i>b</i>]pyrans. [PDF]
Nanoscale AdvMashhourzad B, Zeynizadeh B.
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One-Pot Green Synthesis and Biological Evaluation of Dimedone-Coupled 2,3-Dihydrofuran Derivatives to Divulge Their Inhibition Potential against Staphylococcal Thioredoxin Reductase Enzyme. [PDF]
ACS OmegaShukla M +7 more
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Unveiling the catalytic potential of silicomolybdic acid in crafting diverse biologically relevant organic compounds. [PDF]
RSC AdvSah NK +5 more
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Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 1996
Abstract A detailed study of the 270 MHz 1 H and 67 MHz 13 C NMR spectra of dimedone is reported. J CH coupling constants for the keto and enol forms are presented. In CDCl 3 solution, the C-4 and C-6 carbons of the bulk polymeric enol tautomer are equivalent, with an averaged coupling to C-2, whilst they appear to be magnetically different in ...
Richard J. Cremlyn +2 more
exaly +2 more sources
Abstract A detailed study of the 270 MHz 1 H and 67 MHz 13 C NMR spectra of dimedone is reported. J CH coupling constants for the keto and enol forms are presented. In CDCl 3 solution, the C-4 and C-6 carbons of the bulk polymeric enol tautomer are equivalent, with an averaged coupling to C-2, whilst they appear to be magnetically different in ...
Richard J. Cremlyn +2 more
exaly +2 more sources
Synthesis of Illudinine from Dimedone
Organic Letters, 2017A total synthesis of the illudalane sesquiterpene illudinine was realized in eight steps and 14% overall yield from commercially available dimedone. The approach features tandem fragmentation/Knoevenagel-type condensation and microwave-assisted oxidative cycloisomerization to establish the isoquinoline core.
Alec E. Morrison +3 more
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Acta Crystallographica Section C Crystal Structure Communications, 1997
The crystal structure of 5,5-dimethyl-1,3-cyclohexanedione, C8H12O2, was determined at 133 K. The cyclohexene ring exhibits an envelope conformation. The molecular geometry and the crystal packing - which is stabilized by a hydrogen bond - agree well with the two room-temperature structure determinations.
M. Bolte, M. Scholtyssik
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The crystal structure of 5,5-dimethyl-1,3-cyclohexanedione, C8H12O2, was determined at 133 K. The cyclohexene ring exhibits an envelope conformation. The molecular geometry and the crystal packing - which is stabilized by a hydrogen bond - agree well with the two room-temperature structure determinations.
M. Bolte, M. Scholtyssik
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Synthetic Communications, 1973
Abstract In connection with our synthetic approach to pentacyclic triterpenes,1 we have required substantial amounts of 2,5,5-trimethyl-1,3-cyclohexanedione (methyldimedone, 2), which is available by methylation of dimedone (1).2 However, methylation may also afford the 2,2-dimethyl product 3, the methyl ether 4, and the C, O-dimethyl product 5.
Robin D. Clark +2 more
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Abstract In connection with our synthetic approach to pentacyclic triterpenes,1 we have required substantial amounts of 2,5,5-trimethyl-1,3-cyclohexanedione (methyldimedone, 2), which is available by methylation of dimedone (1).2 However, methylation may also afford the 2,2-dimethyl product 3, the methyl ether 4, and the C, O-dimethyl product 5.
Robin D. Clark +2 more
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Dimedone and phenylazo dimedone chelates of europium as emitters in polymers
Journal of Applied Polymer Science, 2011AbstractTransparent polymers when incorporated with strongly fluorescent europium chelates were found to be responding to excitation with UV radiation. In this work, two novel europium chelates have been synthesized using the β‐diketones dimedone and phenylazo dimedone along with 1,10‐phenanthroline.
Susannah Seth, K. K. Aravindakshan
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Journal für Praktische Chemie, 1979
Vilsmeier‐Reaction on Dimedone.The Vilsmeier‐reaction has been studied in detail for a special cyclic β‐diketone, dimedone. It was shown, that the first step in this reaction is the formation of the corresponding β‐chlorovinylketone. 3‐Chloro‐5,5‐dimethyl‐cyclohex‐2‐en‐one‐(1) 2, 2,4‐dichloro‐6,6‐dimethyl‐1‐formyl‐cyclohexa‐1,3‐diene 3 und 2,4‐dichloro‐
Manfred Pulst +2 more
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Vilsmeier‐Reaction on Dimedone.The Vilsmeier‐reaction has been studied in detail for a special cyclic β‐diketone, dimedone. It was shown, that the first step in this reaction is the formation of the corresponding β‐chlorovinylketone. 3‐Chloro‐5,5‐dimethyl‐cyclohex‐2‐en‐one‐(1) 2, 2,4‐dichloro‐6,6‐dimethyl‐1‐formyl‐cyclohexa‐1,3‐diene 3 und 2,4‐dichloro‐
Manfred Pulst +2 more
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Packing considerations of bis-dimedone derivatives
Acta Crystallographica Section C Crystal Structure Communications, 2001We have determined the crystal structures of 2,2'-(4-fluorophenyl)methylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one), C(23)H(27)FO(4), (I), 2,2'-(4-chlorophenyl)methylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one), C(23)H(27)ClO(4), (II), 2,2'-(4-hydroxyphenyl)methylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one), C(23)H(28)O(5), (III), 2,2'-(
M, Bolte, A, Degen, S, Rühl
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