Damascenone

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beta-Damascenone
Damascenone.png
Damascenone-3D.png
Names
IUPAC name
(E)-1-(2,6,6-Trimethyl-1-cyclohexa-1,3-dienyl)but-2-en-1-one
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.041.662 OOjs UI icon edit-ltr-progressive.svg
PubChem CID
UNII
  • InChI=1S/C13H18O/c1-5-7-11(14)12-10(2)8-6-9-13(12,3)4/h5-8H,9H2,1-4H3/b7-5+ Yes check.svgY
    Key: POIARNZEYGURDG-FNORWQNLSA-N Yes check.svgY
  • InChI=1/C13H18O/c1-5-7-11(14)12-10(2)8-6-9-13(12,3)4/h5-8H,9H2,1-4H3/b7-5+
    Key: POIARNZEYGURDG-FNORWQNLBV
  • O=C(\C1=C(\C=C/CC1(C)C)C)/C=C/C
Properties
C13H18O
Molar mass 190.286 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Damascenones are a series of closely related chemical compounds that are components of a variety of essential oils. The damascenones belong to a family of chemicals known as rose ketones, which also includes damascones and ionones. beta-Damascenone is a major contributor to the aroma of roses, despite its very low concentration, and is an important fragrance chemical used in perfumery. [1]

Contents

The damascenones are derived from the degradation of carotenoids. [2]

In 2008, (E)-β-damascenone was identified as a primary odorant in Kentucky bourbon. [3]

Biosynthesis

The biosynthesis for β-damascenone begins with farnesyl pyrophosphate (FPP) and isopentenyl pyrophosphate (IPP) reacting to produce geranylgeranyl pyrophosphate (GGPP) Figure 1.

Figure 1: GGPP Synthesis GGPP Synthesis.svg
Figure 1: GGPP Synthesis

Next two molecules of GGPP are condensed together to produce phytoene by removal of diphosphate and a proton shift catalyzed by the enzyme phytoene synthase (PSY). Phytoene then goes through a series of desaturation reactions using the enzyme phytoene desaturase (PDS) to produce phytofluene then ζ-carotene. Other enzymes have been found to catalyze this reaction including CrtI and CrtP. [4] The next series of desaturation reactions is catalyzed by the enzyme ζ-carotene desaturase (ZDS) to produced neurosporene followed by lycopene. Other enzymes that are able to catalyze this reaction include CtrI and CrtQ. Next lycopene goes through two cyclization reactions with the use of the enzyme lycopene β-cyclase first producing γ-carotene followed by the second cyclization producing β-carotene as shown in Figure 2.

Figure 2: Beta Carotene Synthesis Beta Carotene Synthesis.svg
Figure 2: Beta Carotene Synthesis

The mechanism for the cyclization of lycopene to β-carotene is shown in Scheme 2.

Scheme 1: Beta-Carotene Mechanism Beta-Carotene Mechanism.svg
Scheme 1: Beta-Carotene Mechanism

Next β-carotene reacts with O2 and the enzyme β-carotene ring hydroxylase producing zeaxanthin. [5] Zeaxanthin then reacts with O2, NADPH (H+), and reduced ferredoxin [iron-sulfur] cluster in the presence of the enzyme zeaxanthin epoxidase (ZE) to produce antheraxanthin which reacts in a similar fashion to produce violaxanthin. Violaxanthin then reacts with the enzyme neoxanthin synthase to form neoxanthin the main precursor for β-damascenone as shown in Figure 3.

Figure 3: Neoxanthin synthesis Neoxanthin Synthesis.svg
Figure 3: Neoxanthin synthesis

[6] In order to generate β-damascenone from neoxanthin there are a few more modifications needed. First neoxanthin undergoes an oxidative cleavage to create the grasshopper ketone. The grasshopper ketone then undergoes a reduction to generate the allenic triol. At this stage there are two main pathways the allenic triol can take to produce the final product. The allenic triol can undergo a dehydration reaction to generate either the acetylenic diol or the allenic diol. Finally one last dehydration reaction of either the acetylenic diol or the allenic diol produces the final product β-damascenone as shown in Figure 4.

Figure 4: Beta-damascenone synthesis Beta-Damascenone Synthesis.svg
Figure 4: Beta-damascenone synthesis

[7] [8] The proposed mechanism for the conversion of the allenic triol to the acetylenic diol is shown in Scheme 3.

Scheme 3: Acetylenic diol mechanism Acetylenic Diol Mechanism.svg
Scheme 3: Acetylenic diol mechanism

The proposed mechanism for the conversion of the acetylenic diol to the final product is shown in Scheme 4.

Scheme 4: Beta-damascenone mechanism Beta-Damascenone Mechanism.svg
Scheme 4: Beta-damascenone mechanism

This mechanism is known as a Meyer-Schuster rearrangement.

See also

Related Research Articles

<span class="mw-page-title-main">Lycopene</span> Carotenoid pigment

Lycopene is an organic compound classified as a tetraterpene and a carotene. Lycopene is a bright red carotenoid hydrocarbon found in tomatoes and other red fruits and vegetables.

<span class="mw-page-title-main">Carotenoid</span> Class of chemical compounds; yellow, orange or red plant pigments

Carotenoids are yellow, orange, and red organic pigments that are produced by plants and algae, as well as several bacteria, archaea, and fungi. Carotenoids give the characteristic color to pumpkins, carrots, parsnips, corn, tomatoes, canaries, flamingos, salmon, lobster, shrimp, and daffodils. Over 1,100 identified carotenoids can be further categorized into two classes – xanthophylls and carotenes.

<span class="mw-page-title-main">Xanthophyll</span> Chemical compounds subclass

Xanthophylls are yellow pigments that occur widely in nature and form one of two major divisions of the carotenoid group; the other division is formed by the carotenes. The name is from Greek: xanthos (ξανθός), meaning "yellow", and phyllon (φύλλον), meaning "leaf"), due to their formation of the yellow band seen in early chromatography of leaf pigments.

<span class="mw-page-title-main">Astaxanthin</span> Chemical compound

Astaxanthin is a keto-carotenoid within a group of chemical compounds known as terpenes. Astaxanthin is a metabolite of zeaxanthin and canthaxanthin, containing both hydroxyl and ketone functional groups. It is a lipid-soluble pigment with red coloring properties, which result from the extended chain of conjugated double bonds at the center of the compound. The presence of the hydroxyl functional groups and the hydrophobic hydrocarbons render the molecule amphiphilic.

The ionones, from greek ἴον ion "violet", are a series of closely related chemical substances that are part of a group of compounds known as rose ketones, which also includes damascones and damascenones. Ionones are aroma compounds found in a variety of essential oils, including rose oil. β-Ionone is a significant contributor to the aroma of roses, despite its relatively low concentration, and is an important fragrance chemical used in perfumery. The ionones are derived from the degradation of carotenoids.

<span class="mw-page-title-main">Phytofluene</span> Chemical compound

Phytofluene is a colorless carotenoid found naturally in tomatoes and other vegetables. It is the second product of carotenoid biosynthesis. It is formed from phytoene in a desaturation reaction leading to the formation of five conjugated double bonds. In the following step, addition of carbon-carbon conjugated double bonds leads to the formation of z-carotene and appearance of visible color.

CRT is the gene cluster responsible for the biosynthesis of carotenoids. Those genes are found in eubacteria, in algae and are cryptic in Streptomyces griseus.

In enzymology, a carotene 7,8-desaturase (EC 1.14.99.30) is an enzyme that catalyzes the chemical reaction

In enzymology, a neoxanthin synthase is an enzyme that catalyzes the chemical reaction:

<span class="mw-page-title-main">Phytoene</span> Chemical compound

Phytoene is a 40-carbon intermediate in the biosynthesis of carotenoids. The synthesis of phytoene is the first committed step in the synthesis of carotenoids in plants. Phytoene is produced from two molecules of geranylgeranyl pyrophosphate (GGPP) by the action of the enzyme phytoene synthase. The two GGPP molecules are condensed together followed by removal of diphosphate and proton shift leading to the formation of phytoene.

<span class="mw-page-title-main">Phaseic acid</span> Chemical compound

Phaseic acid is a terpenoid catabolite of abscisic acid. Like abscisic acid, it is a plant hormone associated with photosynthesis arrest and abscission.

Antheraxanthin is a bright yellow accessory pigment found in many organisms that perform photosynthesis. It is a xanthophyll cycle pigment, an oil-soluble alcohol within the xanthophyll subgroup of carotenoids. Antheraxanthin is both a component in and product of the cellular photoprotection mechanisms in photosynthetic green algae, red algae, euglenoids, and plants.

<span class="mw-page-title-main">15-Cis-phytoene desaturase</span> Class of enzymes

15-cis-phytoene desaturases, are enzymes involved in the carotenoid biosynthesis in plants and cyanobacteria. Phytoene desaturases are membrane-bound enzymes localized in plastids and introduce two double bonds into their colorless substrate phytoene by dehydrogenation and isomerize two additional double bonds. This reaction starts a biochemical pathway involving three further enzymes called the poly-cis pathway and leads to the red colored lycopene. The homologous phytoene desaturase found in bacteria and fungi (CrtI) converts phytoene directly to lycopene by an all-trans pathway.

All-trans-zeta-carotene desaturase is an enzyme with systematic name all-trans-zeta-carotene:acceptor oxidoreductase. This enzyme catalyses the following chemical reaction

Phytoene desaturase (neurosporene-forming) is an enzyme with systematic name 15-cis-phytoene:acceptor oxidoreductase (neurosporene-forming). This enzyme catalyses the following chemical reaction

Phytoene desaturase (zeta-carotene-forming) is an enzyme with systematic name 15-cis-phytoene:acceptor oxidoreductase (zeta-carotene-forming). This enzyme catalyses the following chemical reaction

Phytoene desaturase (3,4-didehydrolycopene-forming) is an enzyme with systematic name 15-cis-phytoene:acceptor oxidoreductase (3,4-didehydrolycopene-forming). This enzyme catalyses the following chemical reaction

<span class="mw-page-title-main">Phytoene desaturase (lycopene-forming)</span>

Phytoene desaturase (lycopene-forming) are enzymes found in archaea, bacteria and fungi that are involved in carotenoid biosynthesis. They catalyze the conversion of colorless 15-cis-phytoene into a bright red lycopene in a biochemical pathway called the poly-trans pathway. The same process in plants and cyanobacteria utilizes four separate enzymes in a poly-cis pathway.

The squalene/phytoene synthase family represents proteins that catalyze the head-to-head condensation of C15 and C20 prenyl units (i.e. farnesyl diphosphate and genranylgeranyl diphosphate). This enzymatic step constitutes part of steroid and carotenoid biosynthesis pathway. Squalene synthase EC (SQS) and Phytoene synthase EC (PSY) are two well-known examples of this protein family and share a number of functional similarities. These similarities are also reflected in their primary structure. In particular three well conserved regions are shared by SQS and PSY; they could be involved in substrate binding and/or the catalytic mechanism. SQS catalyzes the conversion of two molecules of farnesyl diphosphate (FPP) into squalene. It is the first committed step in the cholesterol biosynthetic pathway. The reaction carried out by SQS is catalyzed in two separate steps: the first is a head-to-head condensation of the two molecules of FPP to form presqualene diphosphate; this intermediate is then rearranged in a NADP-dependent reduction, to form squalene:

Lycopene β-cyclase is an enzyme with systematic name carotenoid beta-end group lyase (decyclizing). This enzyme catalyses the following chemical reaction

References

  1. ↑ Rose (Rosa damascena), John C. Leffingwell
  2. ↑ Sachihiko Isoe; Shigeo Katsumura; Takeo Sakan (1973). "The Synthesis of Damascenone and beta-Damascone and the possible mechanism of their formation from carotenoids". Helvetica Chimica Acta. 56 (5): 1514–1516. doi:10.1002/hlca.19730560508.
  3. ↑ LUIGI POISSON; PETER SCHIEBERLE (2008). "Characterization of the Most Odor-Active Compounds in an American Bourbon Whisky by Application of the Aroma Extract Dilution Analysis". Journal of Agricultural and Food Chemistry. 56 (14): 5813–5819. doi:10.1021/jf800382m. PMID   18570373.
  4. ↑ Michael H. Walter; Dieter Strack (2011). "BCarotenoids and their cleavage products: Biosynthesis and functions". Nat. Prod. Rep. 28 (4): 663–692. doi:10.1039/c0np00036a. PMID   21321752.
  5. ↑ Jian Zeng; Cheng Wang; Xi Chen; Mingli Zang; Cuihong Yuan; Xiatian Wang; Qiong Wang; Miao Li; Xiaoyan Li; Ling Chen; Kexiu Li; Junli Chang; Yuesheng Wang; Guangxia Yang; Guangyuan He (2015). "The lycopene β-cyclase plays a significant role in provitamin A biosynthesis in wheat endosperm". BMC Plant Biology. 15 (112): 112. doi: 10.1186/s12870-015-0514-5 . PMC   4433027 . PMID   25943989.
  6. ↑ Koji Mikami; Masashi Hosokawa (2013). "Biosynthetic Pathway and Health Benefits of Fucoxanthin, an Algae-Specific Xanthophyll in Brown Seaweeds". Int. J. Mol. Sci. 14 (7): 13763–13781. doi: 10.3390/ijms140713763 . PMC   3742216 . PMID   23820585.
  7. ↑ Yair Bezman; Itzhak Bilkis; Peter Winterhalter; Peter Fleischmann; Russell L. Rouseff; Susanne Baldermann; Michael Naim (2005). "Thermal Oxidation of 9'-cis-Neoxanthin in a Model System Containing Peroxyacetic Acid Leads to Potent Odorant β-Damascenone". Journal of Agricultural and Food Chemistry. 53 (23): 9199–9206. doi:10.1021/jf051330b. PMID   16277423.
  8. ↑ Peter Winterhalter; Recep Gök (2013). "TDN and β-Damascenone: Two Important Carotenoid Metabolites in Wine". Carotenoid Cleavage Products. ACS Symposium Series. Vol. 1134. pp. 125–137. doi:10.1021/bk-2013-1134.ch011. ISBN   978-0-8412-2778-1.
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