Misplaced Pages

Malonic acid

Names
Preferred IUPAC name Propanedioic acid
Other names Methanedicarboxylic acid
Identifiers
CAS Number	141-82-2
3D model (JSmol)	Interactive image Interactive image
ChEBI	CHEBI:30794
ChEMBL	ChEMBL7942
ChemSpider	844
DrugBank	DB02175
ECHA InfoCard	100.005.003
PubChem CID	867
UNII	9KX7ZMG0MK
CompTox Dashboard (EPA)	DTXSID7021659
InChI InChI=1S/C3H4O4/c4-2(5)1-3(6)7/h1H2,(H,4,5)(H,6,7)Key: OFOBLEOULBTSOW-UHFFFAOYSA-N InChI=1/C3H4O4/c4-2(5)1-3(6)7/h1H2,(H,4,5)(H,6,7)Key: OFOBLEOULBTSOW-UHFFFAOYAJ
SMILES O=C(O)CC(O)=O C(C(=O)O)C(=O)O
Properties
Chemical formula	C3H4O4
Molar mass	104.061 g·mol
Density	1.619 g/cm
Melting point	135 to 137 °C (275 to 279 °F; 408 to 410 K) (decomposes)
Boiling point	decomposes
Solubility in water	763 g/L
Acidity (pKa)	pKa1 = 2.83 pKa2 = 5.69
Magnetic susceptibility (χ)	-46.3·10 cm/mol
Related compounds
Other anions	Malonate
Related carboxylic acids	Oxalic acid Propionic acid Succinic acid Fumaric acid
Related compounds	Malondialdehyde Dimethyl malonate
Hazards
Safety data sheet (SDS)	External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Malonic acid is a dicarboxylic acid with structure CH₂(COOH)₂. The ionized form of malonic acid, as well as its esters and salts, are known as malonates. For example, diethyl malonate is malonic acid's diethyl ester. The name originates from the Greek word μᾶλον (malon) meaning 'apple'.

History

Malonic acid is a naturally occurring substance found in many fruits and vegetables. There is a suggestion that citrus fruits produced in organic farming contain higher levels of malonic acid than fruits produced in conventional agriculture.

Malonic acid was first prepared in 1858 by the French chemist Victor Dessaignes via the oxidation of malic acid.

Structure and preparation

The structure has been determined by X-ray crystallography and extensive property data including for condensed phase thermochemistry are available from the National Institute of Standards and Technology. A classical preparation of malonic acid starts from chloroacetic acid:

Sodium carbonate generates the sodium salt, which is then reacted with sodium cyanide to provide the sodium salt of cyanoacetic acid via a nucleophilic substitution. The nitrile group can be hydrolyzed with sodium hydroxide to sodium malonate, and acidification affords malonic acid. Industrially, however, malonic acid is produced by hydrolysis of dimethyl malonate or diethyl malonate. It has also been produced through fermentation of glucose.

Reactions

Malonic acid reacts as a typical carboxylic acid forming amide, ester, and chloride derivatives. Malonic anhydride can be used as an intermediate to mono-ester or amide derivatives, while malonyl chloride is most useful to obtain diesters or diamides. In a well-known reaction, malonic acid condenses with urea to form barbituric acid. Malonic acid may also be condensed with acetone to form Meldrum's acid, a versatile intermediate in further transformations. The esters of malonic acid are also used as a CH₂COOH synthon in the malonic ester synthesis.

Briggs–Rauscher reaction

Malonic acid is a key component in the Briggs–Rauscher reaction, the classic example of an oscillating chemical reaction.

Knoevenagel condensation

Malonic acid is used to prepare a,b-unsaturated carboxylic acids by condensation and decarboxylation. Cinnamic acids are prepared in this way:

CH₂(CO₂H)₂ + ArCHO → ArCH=CHCO₂H + H₂O + CO₂

In this, the so-called Knoevenagel condensation, malonic acid condenses with the carbonyl group of an aldehyde or ketone, followed by a decarboxylation.

When malonic acid is condensed in hot pyridine, the condensation is accompanied by decarboxylation, the so-called Doebner modification.

Preparation of carbon suboxide

Malonic acid does not readily form an anhydride, dehydration gives carbon suboxide instead:

CH₂(CO₂H)₂ → O=C=C=C=O + 2 H₂O

The transformation is achieved by warming a dry mixture of phosphorus pentoxide (P₄O₁₀) and malonic acid. It reacts in a similar way to malonic anhydride, forming malonates.

Applications

Malonic acid is a precursor to specialty polyesters. It can be converted into 1,3-propanediol for use in polyesters and polymers (whose usefulness is unclear though). It can also be a component in alkyd resins, which are used in a number of coatings applications for protecting against damage caused by UV light, oxidation, and corrosion. One application of malonic acid is in the coatings industry as a crosslinker for low-temperature cure powder coatings, which are becoming increasingly valuable for heat sensitive substrates and a desire to speed up the coatings process. The global coatings market for automobiles was estimated to be $18.59 billion in 2014 with projected combined annual growth rate of 5.1% through 2022.

It is used in a number of manufacturing processes as a high value specialty chemical including the electronics industry, flavors and fragrances industry, specialty solvents, polymer crosslinking, and pharmaceutical industry. In 2004, annual global production of malonic acid and related diesters was over 20,000 metric tons. Potential growth of these markets could result from advances in industrial biotechnology that seeks to displace petroleum-based chemicals in industrial applications.

In 2004, malonic acid was listed by the US Department of Energy as one of the top 30 chemicals to be produced from biomass.

In food and drug applications, malonic acid can be used to control acidity, either as an excipient in pharmaceutical formulation or natural preservative additive for foods.

Malonic acid is used as a building block chemical to produce numerous valuable compounds, including the flavor and fragrance compounds gamma-nonalactone, cinnamic acid, and the pharmaceutical compound valproate.

Malonic acid (up to 37.5% w/w) has been used to cross-link corn and potato starches to produce a biodegradable thermoplastic; the process is performed in water using non-toxic catalysts. Starch-based polymers comprised 38% of the global biodegradable polymers market in 2014 with food packaging, foam packaging, and compost bags as the largest end-use segments.

Eastman Kodak company and others use malonic acid and derivatives as a surgical adhesive.

Pathology

If elevated malonic acid levels are accompanied by elevated methylmalonic acid levels, this may indicate the metabolic disease combined malonic and methylmalonic aciduria (CMAMMA). By calculating the malonic acid to methylmalonic acid ratio in blood plasma, CMAMMA can be distinguished from classic methylmalonic acidemia.

Biochemistry

Malonic acid is the precursor in mitochondrial fatty acid synthesis (mtFASII), in which it is converted to malonyl-CoA by acyl-CoA synthetase family member 3 (ACSF3).

Additionally, the coenzyme A derivative of malonate, malonyl-CoA, is an important precursor in cytosolic fatty acid biosynthesis along with acetyl CoA. Malonyl CoA is formed there from acetyl CoA by the action of acetyl-CoA carboxylase, and the malonate is transferred to an acyl carrier protein to be added to a fatty acid chain.

Malonic acid is the classic example of a competitive inhibitor of the enzyme succinate dehydrogenase (complex II), in the respiratory electron transport chain. It binds to the active site of the enzyme without reacting, competing with the usual substrate succinate but lacking the −CH₂CH₂− group required for dehydrogenation. This observation was used to deduce the structure of the active site in succinate dehydrogenase. Inhibition of this enzyme decreases cellular respiration. Since malonic acid is a natural component of many foods, it is present in mammals including humans.

Related Chemicals

The fluorinated version of malonic acid is difluoromalonic acid.

Malonic acid is diprotic; that is, it can donate two protons per molecule. Its first ${\displaystyle pK_{a}}$ is 2.8 and the second is 5.7. Thus the malonate ion can be HOOCCH₂COO or CH₂(COO)2−2. Malonate or propanedioate compounds include salts and esters of malonic acid, such as

• Diethyl malonate
• Dimethyl malonate
• Disodium malonate
• Malonyl-CoA

References

1. International Union of Pure and Applied Chemistry (2014). Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013. The Royal Society of Chemistry. p. 746. doi:10.1039/9781849733069. ISBN 978-0-85404-182-4.
2. ^ pKa Data Compiled by R. Williams (pdf; 77 kB) Archived 2010-06-02 at the Wayback Machine
3. ^ Chisholm, Hugh, ed. (1911). "Malonic Acid" . Encyclopædia Britannica. Vol. 17 (11th ed.). Cambridge University Press. p. 495.
4. ^ "Propanedioic acid". The Good Scents Company. Retrieved 2020-10-07.
5. Ha CN, Ngoc ND, Ngoc CP, Trung DD, Quang BN (2012). "Organic Acids Concentration in Citrus Juice from Conventional Versus Organic Farming". Acta Horticulturae. 933 (933): 601–606. doi:10.17660/actahortic.2012.933.78. hdl:10400.1/2790. ISSN 0567-7572.
6. Dessaignes V (1858). "Note sur un acide obtenu par l'oxydation de l'acide malique"] (Note on an acid obtained by oxidation of malic acid)". Comptes rendus. 47: 76–79.
7. Gopalan RS, Kumaradhas P, Kulkarni GU, Rao CN (2000). "An experimental charge density study of aliphatic dicarboxylic acids". Journal of Molecular Structure. 521 (1–3): 97–106. Bibcode:2000JMoSt.521...97S. doi:10.1016/S0022-2860(99)00293-8.
8. NIST Chemistry WebBook. "Propanedioic acid".
9. Weiner N. "Malonic acid". Organic Syntheses; Collected Volumes, vol. 2, p. 376.
10. US patent 2373011, Britton EC, Ezra M, "Production of malonic acid", issued 1945-04-03, assigned to Dow Chemical Co 
11. US 20200172941, Dietrich JA, "Recombinant host cells for the production of malonate.", assigned to Lygos Inc 
12. Pollak P, Romeder G (2005). "Malonic Acid and Derivatives". In Pollak P, Romeder G (eds.). Van Nostrand's Encyclopedia of Chemistry. doi:10.1002/0471740039.vec1571. ISBN 0471740039.
13. Csepei LI, Bolla C. "The Effect of Salicylic Acid on the Briggs-Rauscher Oscillating Reaction" (PDF). Studia UBB Chemia. 1: 285–300.
14. Jessup, Peter J.; Petty, C. Bruce; Roos, Jan; Overman, Larry E. (1979). "1-N-Acylamino-1,3-dienes from 2,4-Pentadienoic Acids by the Curtius Rearrangement: benzyl trans-1,3-butadiene-1-carbamate". Organic Syntheses. 59: 1. doi:10.15227/orgsyn.059.0001.
15. Allen, C. F. H.; VanAllan, J. (1944). "Sorbic Acid". Organic Syntheses. 24: 92. doi:10.15227/orgsyn.024.0092.
16. Doebner O (1902). "Ueber die der Sorbinsäure homologen, ungesättigten Säuren mit zwei Doppelbindungen". Berichte der Deutschen Chemischen Gesellschaft. 35: 1136–36. doi:10.1002/cber.190203501187.
17. Diels O, Wolf B (1906). "Ueber das Kohlensuboxyd. I". Chem. Ber. 39: 689–697. doi:10.1002/cber.190603901103.
18. Perks HM, Liebman JF (2000). "Paradigms and Paradoxes: Aspects of the Energetics of Carboxylic Acids and Their Anhydrides". Structural Chemistry. 11 (4): 265–269. doi:10.1023/A:1009270411806. S2CID 92816468.
19. Facke T, Subramanian R, Dvorchak M, Feng S (February 2004). "Diethylmalonate blocked isocyanate as crosslinkers for low temperature cure powder coatings.". Proceedings of 31st International Waterborene, High-Solids and Powder Coating Symposium.
20. James S. Global Automotive Coatings Market. 2015 Grand View Research Market Report (Report).
21. "Malonic acid diesters" (PDF). Inchem. UNEP Publications. Archived from the original (PDF) on 2017-11-18. Retrieved 2015-12-11.
22. Werpy TA, Holladay JE, White JF (August 2004). Werpy TA, Petersen G (eds.). Top Value Added Chemicals From Biomass. Volume I: Results of Screening for Potential Candidates from Sugars and Synthesis Gas (PDF) (Report). US Department of Energy. doi:10.2172/926125. OSTI 926125.
23. Hildbrand, S.; Pollak, P. Malonic Acid & Derivatives. March 15, 2001. Ullmann's Encyclopedia of Industrial Chemistry
24. US 9790350, Netravali AN, Dastidar TG, "Crosslinked native and waxy starch resin compositions and processes for their manufacture.", assigned to Cornell University 
25. Ghosh Dastidar T, Netravali AN (November 2012). "'Green' crosslinking of native starches with malonic acid and their properties". Carbohydrate Polymers. 90 (4): 1620–8. doi:10.1016/j.carbpol.2012.07.041. PMID 22944425.
26. Biodegradable Polymers: Chemical Economics Handbook (Report). IHS Markit. June 2021.
27. US 3591676, Hawkins G, Fassett D, "Surgical Adhesive Compositions" 
28. de Sain-van der Velden MG, van der Ham M, Jans JJ, Visser G, Prinsen HC, Verhoeven-Duif NM, et al. (2016). Morava E, Baumgartner M, Patterson M, Rahman S (eds.). "A New Approach for Fast Metabolic Diagnostics in CMAMMA". JIMD Reports. 30. Berlin, Heidelberg: Springer: 15–22. doi:10.1007/8904_2016_531. ISBN 978-3-662-53681-0. PMC 5110436. PMID 26915364.
29. Witkowski, Andrzej; Thweatt, Jennifer; Smith, Stuart (2011). "Mammalian ACSF3 Protein Is a Malonyl-CoA Synthetase That Supplies the Chain Extender Units for Mitochondrial Fatty Acid Synthesis". Journal of Biological Chemistry. 286 (39): 33729–33736. doi:10.1074/jbc.M111.291591. PMC 3190830. PMID 21846720.
30. Bowman, Caitlyn E.; Rodriguez, Susana; Selen Alpergin, Ebru S.; Acoba, Michelle G.; Zhao, Liang; Hartung, Thomas; Claypool, Steven M.; Watkins, Paul A.; Wolfgang, Michael J. (2017). "The Mammalian Malonyl-CoA Synthetase ACSF3 Is Required for Mitochondrial Protein Malonylation and Metabolic Efficiency". Cell Chemical Biology. 24 (6): 673–684.e4. doi:10.1016/j.chembiol.2017.04.009. PMC 5482780. PMID 28479296.
31. Pardee AB, Potter VR (March 1949). "Malonate inhibition of oxidations in the Krebs tricarboxylic acid cycle". The Journal of Biological Chemistry. 178 (1): 241–250. doi:10.1016/S0021-9258(18)56954-4. PMID 18112108.
32. Potter VR, Dubois KP (March 1943). "Studies on the Mechanism of Hydrogen Transport in Animal Tissues : VI. Inhibitor Studies with Succinic Dehydrogenase". The Journal of General Physiology. 26 (4): 391–404. doi:10.1085/jgp.26.4.391. PMC 2142566. PMID 19873352.
33. Dervartanian DV, Veeger C (1964). "Studies on succinate dehydrogenase". Biochimica et Biophysica Acta (BBA) - Specialized Section on Enzymological Subjects. 92 (2): 233–247. doi:10.1016/0926-6569(64)90182-8.
34. "Metabocard for Malonic acid". Human Metabolome Database. 2020-03-13. Retrieved 2020-10-06.

External links

• Calculator: Water and solute activities in aqueous malonic acid

• Dicarboxylic acids