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Chrysanthemic acid

Chrysanthemic acid
(1R,3R)- or (+)-trans-chrysanthemic acid
Names
IUPAC name
2,2-Dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylic acid
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.022.788 Edit this at Wikidata
  • 16747 (1R,3R) or (+)-trans
  • 33607 (1S,3S) or (−)-trans
  • 33606 (1R,3S) or (+)-cis
  • 20755 (1S,3R) or (−)-cis
UNII
  • InChI=1S/C10H16O2/c1-6(2)5-7-8(9(11)12)10(7,3)4/h5,7-8H,1-4H3,(H,11,12)/t7-,8+/m0/s1
    Key: XLOPRKKSAJMMEW-JGVFFNPUSA-N
  • CC(=CC1C(C1(C)C)C(=O)O)C
Properties
C10H16O2
Molar mass 168.236 g·mol−1
Melting point 17 °C (63 °F; 290 K) (1R,3R) or (+)-trans
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Chrysanthemic acid is an organic compound that is related to a variety of natural and synthetic insecticides. It is related to the pyrethrin I and II, as well as the pyrethroids. One of the four stereoisomers, (1R,3R)- or (+)-trans-chrysanthemic acid (pictured), is the acid part of the ester pyrethrin I, which occurs naturally in the seed cases of Chrysanthemum cinerariaefolium. Many synthetic pyrethroids, for example the allethrins, are esters of all four stereoisomers.[1] Staudinger and Ružička named chrysanthemic acid in 1924.[2]

Biosynthesis

Chrysanthemic acid is derived from its pyrophosphate ester, which in turn is produced naturally from two molecules of dimethylallyl diphosphate.[3]

Industrial synthesis

Chrysanthemic acid is produced industrially in a cyclopropanation reaction of a diene as a mixture of cis- and trans isomers, followed by hydrolysis of the ester:[4]

Chrysanthemic ester synthesis

Many pyrethroids are accessible by re-esterification of chrysanthemic acid ethyl ester - a perfume ingredient.

References

  1. ^ Faust, Rüdiger (2001). "Fascinating Natural and Artificial Cyclopropane Architectures". Angewandte Chemie International Edition. 40 (12): 2251–2253. doi:10.1002/1521-3773(20010618)40:12<2251::AID-ANIE2251>3.0.CO;2-R. PMID 11433485.
  2. ^ H. Staudinger, L. Ružička: "Insektentotende Stoffe H. Zur Konstitution der Chrysanthemummonocarbonsiiure und -dicarbonsiiure", Helv. Chem. Acta 7 (1924) 201
  3. ^ Shattuck-Eidens DM, Wrobel WM, Peiser GD, Poulter CD (2001). "Chrysanthemyl diphosphate synthase: isolation of the gene and characterization of the recombinant non-head-to-tail monoterpene synthase from Chrysanthemum cinerariaefolium". Proc. Natl. Acad. Sci. U.S.A. 98 (8): 4373–8. Bibcode:2001PNAS...98.4373R. doi:10.1073/pnas.071543598. PMC 31842. PMID 11287653.
  4. ^ Kelly Lawrence F (1987). "A synthesis of chrysanthemic ester: An undergraduate experiment". J. Chem. Educ. 64 (12): 1061. Bibcode:1987JChEd..64.1061K. doi:10.1021/ed064p1061.
Quelle: http://en.wikipedia.org/wiki/Chrysanthemic_acid