Results 171 to 180 of about 61,271 (221)

Research of technique for synthesizing carbonyl diethyl malonate

Wuhan University Journal of Natural Sciences, 2011
Diethyl malonate being an initial raw material, processed with chlorination-replacement-desalination-vacuum rectification, is used to produce carbonyl diethyl malonate. An experiment for optimization determines that the best reaction condition was: ① reaction for 7 h at 10 °C with mole-ratio being 2.4:1 between chloride and raw material (diethyl ...
Liuyu Dong, Qiuming Zhou, Xinming Hu, Houying Gui   +3 more
openaire   +2 more sources

Iodine‐Catalyzed Synthesis of Highly Functionalized 1H‐Indene Derivatives from Michael Adducts of o‐Alkynylarene Chalcones with Diethyl Malonate

, 2015
Upon treatment with a substoichiometric amount of iodine in ethanol under reflux conditions, the Michael adducts of o-alkynylarene chalcones with diethyl malonate underwent 5-exo-dig Conia-ene cyclization followed by isomerization to yield highly ...
Sikkandarkani Akbar, K. Srinivasan
semanticscholar   +1 more source

Transformations of diethyl mono- and di(?-chloroallyl)malonates

Chemistry of Heterocyclic Compounds, 1971
In the reaction between γ-chloro-δ-hydroxy-γ-valerolactone and potassium phthalimide in dimethylformamide, γ-phthalimido-δ-hydroxyγ-valerolactone is formed, alkaline hydrolysis of which gives δ-hydroxylevulinic acid. It is shown that oxidation of di(β-chloroallyl)malonic acid with hydrogen peroxide in acetic acid gives the dilactone of bis(δ-hydroxy-γ ...
E. G. Mesropyan, E. N. Dzhandzhapanyan, M. T. Dangyan   +2 more
openaire   +2 more sources

ChemInform Abstract: Structure of Diethyl (Polyfluorobenzoyl)malonates and Their Thermal Intramolecular Cyclization. [PDF]

ChemInform, 2011
AbstractPolyfluorobenzoyl chlorides (I) react with the C‐ethoxymagnesium derivative of diethyl malonate to give the (polyfluorobenzoyl)malonates (III).
E. V. Schegol’kov, Yulia S. Kudyakova, Denis N. Bazhin, V. I. Saloutin, Ya. V. Burgart   +4 more
openaire   +2 more sources

Diethyl (Tetrahydrofurfuryl) Malonate

1959
A 150-ml shaking autoclave A (Fig. 2) was charged with 30 g (0.125 mole) of freshly distilled diethyl furfurylidenemalonate (see p. 35), b.p. 147–148°/2 mm, 45 ml of anhydrous ethanol (Note 1), and 2.5–3 g (3–3.6% of the total amount of solution) of Raney nickel catalyst (Note 2), With the autoclave valves B and C closed, the outlet valve D of the ...
openaire   +2 more sources

Vapor Pressure of Triethyl and Tri-n-Propyl Phosphates and Diethyl Malonate

, 2014
Triethyl phosphate (TEPO, CAS No. 78-40-0), tri-n-propyl phosphate (TPPO, CAS No. 513-08-6), and diethyl malonate (DEM, CAS No. 105-53-3) are of considerable interest to the chemical defense community as nontoxic simulants for toxic chemical warfare ...
A. Brozena, J. H. Buchanan, R. W. Miles, B. Williams, M. Hulet   +4 more
semanticscholar   +1 more source

ChemInform Abstract: CONDENSATION OF 2α‐HYDROXYPINOCAMPHONE WITH DIETHYL MALONATE

Chemischer Informationsdienst, 1980
AbstractBei der Titelreaktion von (I) mit (II) entsteht über (III) das Lacton (IV), das bei Ammonolyse das Lacton (V) und durch alkalische Spaltung das Lacton (VII) liefert.
Z. Chabudzinski, Z. Rykowski
openaire   +2 more sources

Penta‐2,4‐dien‐1‐ones by Formal [3+2] Cycloaddition–Rearrangement of Electron‐Deficient Diethyl 2‐(Dicyanomethylene)malonate with Alk­ynes

, 2016
The reactions of diethyl 2-(dicyanomethylene)malonate, an electron-deficient alkene, with donor-activated and unactivated alkynes have been investigated.
Etienne J. Donckèle, Tristan A. Reekie, Nils Trapp, F. Diederich   +3 more
semanticscholar   +1 more source

New Efficient Ligand-Free, Copper Nanoparticle Catalyzed Coupling Reactions of Aryl Halides with Diethyl Malonate to Produce α-Arylation of Malonates

, 2013
Recently synthesized copper nanoparticles (Cu NP) were used to catalyze coupling of aryl halides with diethyl malonates to produce α-aryl malonates. Synthetic conditions, including solvents, relative amounts of reactants, catalyst, and temperature, etc ...
Gita V. Pai, A. Chattopadhyay
semanticscholar   +1 more source

Synthesis and Crystal Structure Analysis of Substituted Diethyl Malonate

Journal of Chemical Crystallography, 2011
As intermediates of light stabilizer malonate, diethyl 3,5-di-t-butyl-4-hydroxybenzyl phenyl malonates (F.W. 454.58) was synthesized, characterized by 1H NMR, element analysis and confirmed by X-ray crystal structure analysis. This compound crystallizes in monoclinic class under the space group P21/c with cell parameters, a = 9.8218(4) A, b = 13.5571(5)
Xiao-Li Zhen, Juan Feng, Shouxin Liu, Ya-hui Gao, Jian-Rong Han   +4 more
openaire   +2 more sources