Pyrethrin II

Pyrethrin II
Names
Preferred IUPAC name
(1S)-2-Methyl-4-oxo-3-[(2Z)-penta-2,4-dien-1-yl]cyclopent-2-en-1-yl (1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl]-2,2-dimethylcyclopropane-1-carboxylate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.004.057 Edit this at Wikidata
EC Number
  • 204-462-6
UNII
  • InChI=1S/C22H28O5/c1-7-8-9-10-15-14(3)18(12-17(15)23)27-21(25)19-16(22(19,4)5)11-13(2)20(24)26-6/h7-9,11,16,18-19H,1,10,12H2,2-6H3/b9-8+,13-11-/t16-,18?,19?/m0/s1
    Key: VJFUPGQZSXIULQ-CDPVRPLUSA-N
  • CC1=C(C(=O)CC1OC(=O)C2[C@@H](C2(C)C)/C=C(/C)\C(=O)OC)C/C=C/C=C
Properties
C22H28O5
Molar mass 372.45472
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H302, H312, H332, H410
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Pyrethrin II is an organic compound that is a potent insecticide. It is one of the two pyrethrins, the other being pyrethrin I. Thousands of tons this mixture are produced annually from chrysanthemum plants, which are cultivated in warm climates.[1]

Whereas pyrethrin I is a derivative of (+)-trans-chrysanthemic acid, in pyrethrin II one methyl group is oxidized to a carboxymethyl group, the resulting core being called pyrethric acid. Knowledge of their chemical structures opened the way for the production of synthetic analogues, which are called pyrethroids. In terms of their biosynthesis, pyrethrins are classified as terpenoids, being derived from dimethylallyl pyrophosphate.[2]

References

  1. ^ Robert L. Metcalf “Insect Control” in Ullmann’s Encyclopedia of Industrial Chemistry” Wiley-VCH, Weinheim, 2002. doi:10.1002/14356007.a14_263
  2. ^ Susan B. Rivera, Bradley D. Swedlund, Gretchen J. King, Russell N. Bell, Charles E. Hussey, Jr., Donna M. Shattuck-Eidens, Wislawa M. Wrobel, Galen D. Peiser, and C. Dale Poulter "Chrysanthemyl diphosphate synthase: Isolation of the gene and characterization of the recombinant non-head-to-tail monoterpene synthase from Chrysanthemum cinerariaefolium" Proceedings of the National Academy of Sciences 2001, volume 98, p 4373-4378. doi:10.1073/pnas.071543598


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