1,4-Naphthoquinone: Difference between revisions
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{{chembox |
{{chembox |
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| verifiedrevid = 414651852 |
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| Reference =<ref>''Merck Index'', 11th Edition, '''6315'''.</ref> |
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| Name = Naphthoquinone |
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| ImageSize = 130 |
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| ImageFile1 = 1,4-Naphthoquinone-3D-balls.png |
| ImageSize = 130 |
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| ImageFile1 = 1,4-Naphthoquinone-3D-balls.png |
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| ImageSize1 = 180 |
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| ImageName1 = Ball-and-stick model |
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| PIN = Naphthalene-1,4-dione <!-- Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book) --> |
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| IUPACName = 4a,8a-Dihydronaphthalene-1,4-dione |
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| OtherNames = 1,4-Naphthoquinone<br />Naphthoquinone<br />α-Naphthoquinone |
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|Section1={{Chembox Identifiers |
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| CASNo_Ref = {{cascite|correct|CAS}} |
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| CASNo = 130-15-4 |
| CASNo = 130-15-4 |
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| UNII_Ref = {{fdacite|correct|FDA}} |
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| SMILES = O=C2C=CC(C1=CC=CC=C12)=O |
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| UNII = RBF5ZU7R7K |
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| ChEMBL_Ref = {{ebicite|changed|EBI}} |
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| ChEMBL = 55934 |
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| PubChem = 8530 |
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| ChemSpiderID = 8215 |
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| InChI = 1/C10H6O2/c11-9-5-6-10(12)8-4-2-1-3-7(8)9/h1-6H |
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| InChIKey = FRASJONUBLZVQX-UHFFFAOYAK |
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| StdInChI = 1S/C10H6O2/c11-9-5-6-10(12)8-4-2-1-3-7(8)9/h1-6H |
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| StdInChIKey = FRASJONUBLZVQX-UHFFFAOYSA-N |
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| SMILES = O=C1c2ccccc2C(=O)cc1 |
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|Section2={{Chembox Properties |
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| Formula = C{{sub|10}}H{{sub|6}}O{{sub|2}} |
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| MolarMass = 158.15 g/mol |
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| Density = 1.422 g/cm{{sup|3}} |
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| MeltingPtC = 126 |
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| BoilingPt = Begins to sublime at 100 °C |
| MeltingPt_notes = |
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| BoilingPt = Begins to sublime at 100 °C |
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| Solubility = 0.09 g/L |
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| MagSus = -73.5·10{{sup|−6}} cm{{sup|3}}/mol |
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'''1,4-Naphthoquinone''' or '''para-naphthoquinone''' is a [[quinone]] derived from [[naphthalene]]. It forms volatile yellow triclinic crystals and has a sharp odor similar to [[1,4-Benzoquinone|benzoquinone]]. It is almost insoluble in cold water, slightly soluble in [[petroleum ether]], and more soluble in polar organic solvents. In [[alkaline]] solutions it produces a reddish-brown color. Vitamin K is a derivative of 1,4-naphthoquinone. It is a planar molecule with one aromatic ring fused to a quinone subunit.<ref>{{ cite journal |author1=Gaultier, J. |author2=Hauw, C. | title = Structure de l'α-Naphtoquinone | journal = Acta Crystallographica | year = 1965 | volume = 18 | issue = 2 | pages = 179–183 | doi = 10.1107/S0365110X65000439 |bibcode=1965AcCry..18..179G }}</ref> It is an [[isomer]] of [[1,2-Naphthoquinone|1,2-naphthoquinone]]. |
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'''Naphthoquinone''' is a class of [[natural phenol]]s based on the C6-C4 skeleton. |
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==Preparation== |
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1,4-Naphthoquinone can be viewed as derivatives of [[naphthalene]] through the replacement of two [[hydrogen]] atoms by two [[ketone]] groups. |
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The industrial synthesis involves aerobic oxidation of naphthalene over a vanadium oxide catalyst:<ref name=Ullmann>{{ Ullmann | author = Grolig, J. | author2 = Wagner, R. | title = Naphthoquinones | doi = 10.1002/14356007.a17_067 }}</ref> |
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:C{{sub|10}}H{{sub|8}} + 3/2 O{{sub|2}} → C{{sub|10}}H{{sub|6}}O{{sub|2}} + H{{sub|2}}O |
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In the laboratory, naphthoquinone can be produced by the oxidation of a variety of naphthalene compounds. An inexpensive route involves oxidation of naphthalene with [[chromium trioxide]].<ref>{{ OrgSynth | author = Braude, E. A. | author2 = Fawcett, J. S. | year = 1953 | title = 1,4-Naphthoquinone | volume = 33 | pages = 50 | collvol = 4 | collvolpages = 698 | prep = CV4P0698 | url = http://www.orgsyn.org/orgsyn/pdfs/CV4P0698.pdf }}</ref> |
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==Reactions== |
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The name is also used generically for two other [[isomer]]s: |
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1,4-Naphthoquinone acts as strong [[dienophile]] in [[Diels-Alder reaction]]. Its adduct with [[1,3-butadiene]] can be prepared by two methods: 1) long (45 days) exposure of naphthoquinone in neat liquid butadiene taken in huge excess at room temperature in a thick-wall glass tube or 2) fast catalyzed [[cycloaddition]] at low temperature in the presence of 1 equivalent of [[tin(IV) chloride]]:<ref>{{ cite journal | author = M.A. Filatov | author2 = S. Baluschev | author3 = I.Z. Ilieva| author4 = V. Enkelmann | author5 = T. Miteva| author6 = K. Landfester | author7 = S.E. Aleshchenkov | author8 = A.V. Cheprakov | title = Tetraaryltetraanthra[2,3]porphyrins: Synthesis, Structure, and Optical Properties | journal = J. Org. Chem. | year = 2012 | volume = 77 | issue = 24 | pages = 11119–11131 | doi = 10.1021/jo302135q | pmid = 23205621 }}</ref> |
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* [[1,2-Naphthoquinone]] |
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[[File:Naphthoquinone reaction with butadiene.tif|center|400 px|Diels-Alder reaction of 1,4-naphthoquinone with 1,3-butadiene]] |
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* [[1,4-Naphthoquinone]] |
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* [[2,6-Naphthoquinone]] (''amphi''-naphthoquinone) |
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==Uses== |
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Naturally occurring naphtoquinones |
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1,4-Naphthoquinone is mainly used as a precursor to [[anthraquinone]] by reaction with butadiene followed by oxidation. Nitration gives 5-nitro-1,4-naphthalenedione, precursor to an {{Not a typo|aminoanthroquinone}} that is used as a dye precursor.<ref name=Ullmann/> |
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* [[Juglone]] |
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* [[Plumbagin]] |
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* [[Droseraceae|Droserone]] |
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==Derivatives== |
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1,4-Naphthoquinone forms yellow triclinic crystals and has an odor similar to [[benzoquinone]]. It is sparingly soluble in cold water, slightly soluble in [[petroleum ether]], and freely soluble in most polar organic solvents. In [[alkaline]] solutions it produces a reddish-brown color. Because of their aromatic stability, 1,4-naphthoquinone derivatives are known to possess anti-bacterial and anti-tumor properties. |
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Other natural naphthoquinones include [[juglone]], [[plumbagin]], [[Droseraceae|droserone]]. |
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⚫ | Naphthoquinone [[derivative (chemistry)|derivatives]] have significant pharmacological properties. They are [[cytotoxic]], they have significant [[antibacterial]], [[Antifungal medication|antifungal]], [[Antiviral drug|antiviral]], [[Insecticide|insecticidal]], [[anti-inflammatory]], and [[antipyretic]] properties. Plants with naphthoquinone content are widely used in China and the countries of South America, where they are used to treat malignant and parasitic diseases.<ref>{{ cite journal | last1 = Babula | first1 = P. | last2 = Adam | first2 = V. | last3 = Havel | first3 = L. | last4 = Kizek | first4 = R. |title = Naphthoquinones and their Pharmacological Properties | language = Czech | journal = Ceská a Slovenská Farmacie | year = 2007 | volume = 56 | issue = 3 | pages = 114–120 | pmid = 17867522 }}</ref> |
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==Medicinal uses== |
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⚫ | Naphthoquinone derivatives have significant pharmacological properties. They are [[cytotoxic]], they have significant [[antibacterial]], [[antifungal]], [[antiviral]], [[insecticidal]], [[anti-inflammatory]], and [[antipyretic]] properties. Plants with naphthoquinone content are widely used in China and the countries of South America, where they are used to treat malignant and parasitic diseases.<ref>{{cite journal | last1 = Babula | first1 = P | last2 = Adam | first2 = V | last3 = Havel | first3 = L | last4 = Kizek | first4 = R | |
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Naphthoquinone functions as a ligand through its electrophilic carbon-carbon double bonds.<ref>{{ cite journal |author1=Kündig, E. P. |author2=Lomberget, T. |author3=Bragg, R. |author4=Poulard, C. |author5=Bernardinelli, G. | title = Desymmetrization of a ''meso''-Diol Complex Derived from <nowiki>[</nowiki>Cr(CO){{sub|3}}(η{{sup|6}}-5,8-Naphthoquinone)<nowiki>]</nowiki>: Use of New Diamine Acylation Catalysts | journal = Chemical Communications | year = 2004 | volume = 2004 | issue = 13 | pages = 1548–1549 | doi = 10.1039/b404006f |pmid=15216374 }}</ref> |
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[[Dichlone]], a chlorinated derivative of 1,4-naphthoquinone, is used as a fungicide. |
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==See also== |
==See also== |
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*[[1,4-Benzoquinone]] |
*[[1,4-Benzoquinone]] |
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*[[Plumbagin]] |
*[[Plumbagin]] |
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*[[ |
*[[Hooker reaction]] |
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==References== |
==References== |
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{{reflist}} |
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<references/> |
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{{Vitamin}} |
{{Vitamin}} |
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{{Natural phenol}} |
{{Natural phenol}} |
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[[Category:Naphthoquinones]] |
[[Category:1,4-Naphthoquinones]] |
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[[ar:نفتوكينون]] |
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[[de:1,4-Naphthochinon]] |
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[[it:Naftochinone]] |
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[[nl:Naftochinon]] |
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[[ja:ナフトキノン]] |
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[[pl:Naftochinon]] |
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[[pt:Naftoquinona]] |
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[[zh:萘醌]] |