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Topic: Malonic acid


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In the News (Thu 31 Dec 09)

  
  Nikon MicroscopyU Movie Gallery: Malonic Acid
Malonic Acid Video No. 1 - A highly colored spectrum of crystallites are slowly formed during time-lapse cinemicrography of malonic acid under polarized illumination at a magnification of 200x with a playing time of 17.4 seconds.
In its purified form, malonic acid is a white, crystalline substance, water-soluble and easily decomposed by heat.
Although malonic acid is a normal component of human urine, in small quantities, a genetic disorder called methyl malonic aciduria can cause high levels of methyl malonic acid in the blood serum and urine.
www.microscopyu.com /moviegallery/chemicalcrystals/malonicacid/index.html   (210 words)

  
  Malonic acid - Wikipedia, the free encyclopedia
Malonic acid (from Latin malum = apple) (1,3-propanedioic acid) is a dicarboxylic acid with structure CH
Malonic acid inhibits succinate dehydrogenase in the citric acid cycle.
Malonic acid is frequently used as an enolate in Knoevenagel condensations or condensed with acetone to form Meldrum's acid.
en.wikipedia.org /wiki/Malonic_acid   (190 words)

  
 MALONIC ACID - LoveToKnow Article on MALONIC ACID   (Site not responding. Last check: 2007-11-02)
Many esters of malonic acid have been prepared, the most important being the diethyl ester (malonic ester), CH2(COOC,H5)2, which is obtained by dissolving monochioracetic acid in water, neutralizing the solution with potassium carbonate, and then adding potassium cyanide and warming the mixture until the reaction begins.
These esters are readily hydrolysed and yield the monoand di-alkyl malonic acids which, on heating, are readily decomposed, with evolution of carbon dioxide and the formation of mono- and di-alkyl acetic acids.
The half nitrile of malonic acid is cyanacetic acid, CNCHf COOH, which, in the form of its ester, may be obtained by the action of a solution of potassium cyanide on monochloracetic acid.
4.1911encyclopedia.org /M/MA/MALONIC_ACID.htm   (584 words)

  
 Carboxyl Reactivity
Carboxylic acids that have a higher equilibrium enol concentration do not need to be activated for alpha-halogenation to occur, as demonstrated by the substituted malonic acid compound in the second equation below.
Since simple ketones are weaker acids than water, their enolate anions are necessarily prepared by reaction with exceptionally strong bases in non-hydroxylic solvents.
Malonic acid esters and acetoacetic acid esters are commonly used starting materials, and their usefulness in synthesis will be demonstrated later in this chapter.
www.cem.msu.edu /~reusch/VirtualText/crbacid3.htm   (2310 words)

  
 DIETHYL ALLYLMALONATE (MALONIC ACID, ALLYL-, DIETHYL ESTER)
Malonic acid (also called Propanedioic Acid) is a white crystalline C-3 dicarboxylic acid; melting at 135 -136 C; readily soluble in water, alcohol and ether; solution in water is medium-strong acidic.
Diethyl malonate, a colourless, fragrant liquid boiling at 199 C, is prepared by the reaction of monochloroacetatic acid with methanol, carbon monoxide or by the reaction cyanoacetic acid (the half nitriled-malonic acid) with ethyl alcohol.
The methylene groups in 1,3-dicarboxylic acid utilize the synthesis of barbiturates; a hydrogen atom is removed by sodium ethoxide, and the derivative reacts with an alkyl halide to form a diethyl alkylmalonate.
www.chemicalland21.com /arokorhi/lifescience/phar/DIETHYL%20ALLYLMALONATE.htm   (285 words)

  
 Process for producing acrylic rubber by copolymerizing acrylic ester and malonic acid derivative having active ...
Thus, the derivatives are malonic acids with an active methylene group having one of two acid radicals esterified with an unsaturated alcohol such as allyl alcohol, and having the other acid radical esterified with a saturated alcohol.
A mixture of 1 mole of ethyl cyanoacetate, 1 mole of sulfuric acid and 1 mole of water is kept at 80.degree.
The malonic acid derivatives include esters of cyanoacetic acid (that is, malonic acid mononitrile) having an active methylene group with an unsaturated alcohol, such as allyl cyanoacetate or methallyl cyanoacetate, and esters thereof with hydroxyethyl acrylate or hydroxyethyl methacrylate.
www.freepatentsonline.com /4154914.html   (2681 words)

  
 Effect of heat on dicarboxylic acid   (Site not responding. Last check: 2007-11-02)
Malic acid contains one asymmetric carbon atom it exists in two optically active form (+), (-) and a racemic form which is a mixture of  50% (+) and 50% (-).
Carbonic acid is assumed to exist in solution of carbon dioxide in water but it has not been isolated structurally it is hydroxy formic acid but because in its derivatives, carbonic acid function as a dibasic acid it is unstable but its acid chloride, amide and ester are stable.
It is the acid chloride of carbonic acid.
www.kaau.edu.sa /KBADAHDAH/lecturefive232.htm   (384 words)

  
 Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Malonic Acid
Sometimes alternatively referred to as propanedioic acid, malonic acid is a dicarboxylic acid of ethane with a methylene group separating the two carbonyl moieties.
Water-soluble, white, and crystalline, malonic acid, which is readily decomposed by heat and relatively unstable in its free form, has little practical use other than acting as a biochemical diagnostic probe for intermediary metabolism.
Unusually high levels of malonic acid in the urine is often an indication of a genetic disorder known as malonic aciduria.
www.olympusmicro.com /galleries/polarizedlight/pages/malonicacidsmall.html   (238 words)

  
 Substituted malonic acid derivatives and their use as stabilizers - Patent 4198334
Such acids can be inorganic acids such as sulphuric, hydrochloric or phosphoric acid, organic carboxylic acids such as formic, acetic, oxalic, maleic, benzoic or salicylic acid, organic sulphonic acids such as methane- or p-toluenesulphonic acid, or organic phosphorus-containing acids such as diphenylphosphoric acid, methanephosphonic acid or diphenylphosphinic acid.
Further examples are halogenocarboxylic acid esters such as chloroacetic acid esters of mono- or bivalent hydroxyl compounds, or carboxylic acid esters of halogenohydrines such as esters of 2-chloroethanol or 3-bromopropanol.
Polyesters which are derived from dicarboxylic acids and dialcohols and/or from hydroxycarboxylic acids or the corresponding lactones, such as polyethylene terephthalate, polybutylene terephthlate and poly-1,4-dimethylol-cyclohexane terephthalate, as well as copolyether-esters, wherein all or a part of the used diol is an ether-diol or polyetherdiol.
www.freepatentsonline.com /4198334.html   (6929 words)

  
 Briggs-Rauscher Reaction
The oscillating sequence repeats until the malonic acid or IO is depleted.
Sulfulric acid is a strong acid and is corrosive to eyes, skin and other tissue.
Malonic acid is a strong irritant to skin, eyes, and mucous membranes.
library.thinkquest.org /10429/high/cool/labs/osc.htm   (547 words)

  
 Malonic Aciduria
Malonic Aciduria is a rare disorder caused by deficiency of Malonyl-CoA Decarboxylase (MCD).
The presentation of malonic aciduria due to MCD deficiency is variable, ranging from an acute neonatal onset to later in childhood.
Because the diagnosis and therapy of Malonic Aciduria is complex, the pediatrician is advised to manage the patient in close collaboration with a consulting pediatric metabolic disease specialist.
www.pediatrix.com /body_screening_menu.cfm?id=1775   (487 words)

  
 Bis-substituted malonic acid hydroxamate derivatives as inhibitors of human neutrophil collagenase ( MMP8).   (Site not responding. Last check: 2007-11-02)
Bis-substituted malonic acid hydroxamate derivatives as inhibitors of human neutrophil collagenase (MMP8).For optimal insertion of the aryl amide group into the hydrophobic S1' pocket, spacing of the C-terminal phenyl group by at least a 3C-chain was required.
Malonic acid hydroxamate derivatives bis-substituted at the methylene group were synthesized as potential nonpeptidic inhibitors of human neutrophil collagenase (MMP8).
In view of these results the achiral indan-2, 2-dicarboxylic acid was used to mimic the 2-benzyl-2-methylmalonic acid residue, and its derivatization to the 3-phenylpropyl amide hydroxamate produced a potent, achiral, low-mass inhibitor of MMP8 (Ki = 0.3 microM), the binding mode of which was unambiguously determined by X-ray crystallographic analysis.
www.pdg.cnb.uam.es /UniPub/iHOP/gp/1511926.html   (163 words)

  
 [No title]   (Site not responding. Last check: 2007-11-02)
The method of claim 6 wherein the e, e, e malonic acid/acetic acid tri-adduct of buckminsterfullerene is selected from the group consisting of the Penta Pair, the Tetra Quartet and C3-lite.
The process of claim 13 wherein the e, e, e malonic acid/acetic acid tri-adduct of buckminsterfullerene is selected from the group consisting of the Penta Pair, the Tetra Quartet and C3-lite.
wherein the derivative is an e, e, e malonic acid tri-adduct of buckminsterfullerene, e, e, e acetic acid tri-adduct of buckminsterfullerene, or a mixed of e, e, e malonic acid tri-adduct of buckminsterfullerene and e, e, e acetic acid tri-adduct of buckminsterfullerene, and wherein each
www.wipo.int /cgi-pct/guest/getbykey5?KEY=04/76349.041104&ELEMENT_SET=DECL   (1849 words)

  
 Malonic acid derivatives - Patent 4835153
A malonate acid derivative as in any one of claims 1 or 2 which is ethyl isopropyl(2,5-dimethyl-2,5-diaza-7,9-dithiabicyclo-[4,3,0]-nonane-8-yliden e)malonate.
For the acids usable in preparing the salt, there are exemeplified, for example, inorganic acids such as hydrogen chloride, sulfuric acid, phosphoric acid etc, organic carboxylic acids such as acetic acid, succinic acid, fumaric acid, tartaric acid and organic sufonic acids such as methanesulfonic acid, heptanesulfonic acid benzenesulfonic acid, toluenesulfonic acid.
Malonic acid derivative represented by the general formula (I) and their salts caused no toxic symptom nor death in mice or rats even after administered continually for two weeks at a dose of 300 mg/kg/day to the mice or rats, which reveals the markedly low toxicity of the compound of this invention.
www.freepatentsonline.com /4835153.html   (4801 words)

  
 C3H404 MALONIC ACID - Online Information article about C3H404 MALONIC ACID
143) ; by the hydrolysis of cyanacetic acid (H.
half nitrile of malonic acid is cyanacetic acid, CN•CH•2 COOH, which, in the form of its ester, may be obtained by the action of a solution of potassium See also:
The true nitrile of malonic acid is methylene cyanide, CH2 (CN)2, which is obtained by distilling a mixture of cyanacetamide and See also:
encyclopedia.jrank.org /MAL_MAR/MALONIC_ACID_C3H404.html   (346 words)

  
 Raw and Living Foods Articles - B12
Using the methyl malonic acid reduction approach, which is now the gold standard, research showed that when people used dry and raw nori from Japan, the dried nori actually made the methyl malonic acid (MMA) status worse, which means it actually reduced the B-12 status.
Until research is done to see if it actually lowers the methyl malonic acid levels, the question has to be raised that we can't assume that because a food has human active B-12 it will help avoid a B-12 deficiency, because the actual non-human active analogs may be blocking the human active B-12.
Using the methyl malonic acid study as the gold standard, elevated methyl malonic acid was found in subjects with a B-12 up to 486 pg.
www.rawbc.org /articles/B12.html   (4317 words)

  
 malonic acid --  Encyclopædia Britannica
Its calcium salt occurs in beetroot, but the acid itself is usually prepared by hydrolyzing diethyl malonate.
As noted previously, carbon suboxide, C3O2, is the acid anhydride of malonic acid, CH2(COOH)2, which is considered by some to be a carbonic acid.
The -hydroxy acids form cyclic dimeric esters (formed by the esterification of two molecules of the acid) called lactides, while the - and -hydroxy acids undergo intramolecular esterification to cyclic esters called lactones.
www.britannica.com /eb/article-9050365   (827 words)

  
 Belousov-Zhabotinskii Lab
Malonic acid (CH) is a strong irritant to skin, eyes, and mucous membranes.
The Overall reaction that occurs is the cerium-catalyzed oxidation of malonic acid of malonic acid by bromate ions in dilute sulfuric acid.
The bromomalonic acid is oxidized by the Mn(III) and releases bromide ions:
ed.augie.edu /~gjhonsbr/BZ_lab.html   (3494 words)

  
 Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Malonic Acid
Sometimes alternatively referred to as propanedioic acid, malonic acid is a dicarboxylic acid of ethane with a methylene group separating the two carbonyl moieties.
Water-soluble, white, and crystalline, malonic acid, which is readily decomposed by heat and relatively unstable in its free form, has little practical use other than acting as a biochemical diagnostic probe for intermediary metabolism.
Unusually high levels of malonic acid in the urine is often an indication of a genetic disorder known as malonic aciduria.
olympusmicro.com /galleries/polarizedlight/pages/malonicacidsmall.html   (238 words)

  
 Spectroscopy of Hydrothermal Reactions. 5. Decarboxylation Kinetics of Malonic Acid and Monosodium Malonate   (Site not responding. Last check: 2007-11-02)
Malonic acid and monosodium malonate decomposed in a single step to CO and acetic acid and CO and the acetate ion, respectively.
The kinetics for malonic acid were modeled as an equilibrium between malonic acid and the monoanion with parallel decarboxylation of both species.
Decarboxylation of the monoanion is slower than that of malonic acid.
pubs.acs.org /cgi-bin/abstract.cgi/jpchax/1996/100/i34/abs/jp960397m.html   (215 words)

  
 Ethyl aceto acetate   (Site not responding. Last check: 2007-11-02)
*1*Diethyl malonate (malonic ester) from a relatively stable enolate ion.
The dicarboxylic acid are commonly known by names which indicate their source e.g.
The alternative scheme is to regard the carboxyl group as a subistituent and the name of the acid is then obtained by adding the suffix carboxylic acid e.g.
www.kaau.edu.sa /KBADAHDAH/lecturefour323.htm   (577 words)

  
 Acids from Malonic Esters   (Site not responding. Last check: 2007-11-02)
One more difference - malonic acid, even though it has a beta-dicarbonyl unit, it is a fairly stable molecule and needs to be heated (preferably with acid) to decarboxylate it.
Another great advantage of using malonic ester is that we can make cyclic compounds by treating the disodium salt with a dibromoalkane.
This is a great way to make unsaturated acids (but the aldehyde should not contain alpha-protons or an aldol condensation will occur!) for example cinnamic acid.
orac.sunderland.ac.uk /~hs0bcl/org7.htm   (313 words)

  
 Chapter 21: Malonic esters   (Site not responding. Last check: 2007-11-02)
Malonic esters are the esters of malonic acid (systematic name : propanedioic acid)
Acid or base catalysed hydrolysis of both esters to give the parent dicarboxylic acid, a substituted malonic acid.
Loss of CO decarboxylation, readily occurs giving a substituted carboxylic acid.
www.chem.ucalgary.ca /courses/351/Carey/Ch21/ch21-5-2.html   (170 words)

  
 Articles - Carboxylic acid   (Site not responding. Last check: 2007-11-02)
Alkylbenzene oxidation of Potassium permanganate to benzoic acids.
Less-common reactions involving the generation of benzoic acids are the von Richter reaction from nitrobenzenes and the Kolbe-Schmitt reaction from phenols.
Carboxylic acids are decarboxylated in the Hunsdiecker reaction and α-brominated in the Hell-Volhard-Zelinsky halogenation.
www.sewing-center.com /articles/Carboxylic_acid   (600 words)

  
 Dr Hulda Clark.org - This site is dedicated to the teachings of Dr. Hulda Clark and the therapeautic techniques that ...
The tapeworm cleanse also helps because malonates is a secretion from a tapeworm so unless you kill the tapeworm there is no getting rid of malonic acid.
We were forced to conclude that detoxifying malonic acid after consuming it did not prevent the damage done by it.
Avoiding malonic acid in your foods is the first rule in curing tumor disease.
www.drhuldaclark.org /therapy_68d.asp   (316 words)

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