Patchoulol

Patchoulol
Names
	Preferred IUPAC name (1R,4S,4aS,6R,8aS)-4,8a,9,9-Tetramethyldecahydro-1,6-methanonaphthalen-1-ol
	Other names Patchouli camphor;; (−)-Patchoulol;; (1R,3R,6S,7S,8S)-Patchoulol;; Patchouli alcohol
Identifiers
CAS Number	5986-55-0 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:7940;
ChemSpider	9130391;
ECHA InfoCard	100.025.279
EC Number	227-807-2;
KEGG	C09705;
PubChem CID	10955174;
UNII	HHH8CPR1M2 ;
CompTox Dashboard (EPA)	DTXSID9052266 ;
	InChI InChI=1S/C15H26O/c1-10-5-8-15(16)13(2,3)11-6-7-14(15,4)12(10)9-11/h10-12,16H,5-9H2,1-4H3/t10-,11+,12-,14-,15+/m0/s1 Key: GGHMUJBZYLPWFD-CUZKYEQNSA-N;
	SMILES O[C@@]23CC[C@@H]([C@@H]1C[C@@H](CC[C@@]12C)C3(C)C)C;
Properties
Chemical formula	C15H26O
Molar mass	222.36
Appearance	white solid
Density	1.0284 g/mL
Melting point	56 °C (133 °F; 329 K) (racemic)
Boiling point	287–288 °C (549–550 °F; 560–561 K)
Solubility in water	practically insoluble
Solubility in ethanol	soluble
Solubility in diethyl ether	soluble
Refractive index (nD)	1.5029
Hazards
Safety data sheet (SDS)	External MSDS
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Patchoulol or patchouli alcohol (C₁₅H₂₆O) is a sesquiterpene alcohol found in patchouli.^[1] Patchouli oil is an important material in perfumery. The (−)-optical isomer is one of the organic compounds responsible for the typical patchouli scent. Patchoulol is obtained by fermentation of leaves of Pogostemon cablin.^[2]

Patchoulol is also used in the synthesis of the chemotherapy drug Taxol.^{[citation needed]}

Structure determination

Gal first isolated patchouli alcohol in 1869, and Montgolfier later formulated its chemical composition (correctly) as C₁₅H₂₆O.^[3] Early structural investigation soon established the presence of a saturated tricyclic tertiary alcohol.^[4] After several years of careful degradation study, Büchi and co-workers proposed that patchouli alcohol had the structure 1. A subsequent synthesis of material which corresponded to an authentic sample of natural patchouli alcohol appeared to verify Büchi's proposal.^[5]

However, Dunitz and co-workers serendipitously discovered that Büchi's structure is in fact incorrect. Dunitz et al. had undertaken X-ray analysis of the patchouli alcohol diester with chromic acid, intending to determine the Cr-O-C angles. In the course of their analysis they could not reconcile the X-ray evidence with the "known" structure 1.^[6] In a joint paper with Büchi, they collectively proposed that patchouli alcohol in fact had the novel structure 2. The discrepancy had resulted from an unanticipated skeletal rearrangement when patchoulene was treated with peroxy acid in Büchi's confirmatory synthesis. The rearranged molecule coincidentally exhibited the correct natural product architecture.^[7]

References

^ Deguerry, F.; Pastore, L.; Wu, S.; Clark, A.; Chappell, J.; Schalk, M. (2006). "The diverse sesquiterpene profile of patchouli, Pogostemon cablin, is correlated with a limited number of sesquiterpene synthases". Archives of Biochemistry and Biophysics. 454 (2): 123–136. doi:10.1016/j.abb.2006.08.006. PMID 16970904.
^ Sell, Charles S. (2006). "Terpenoids". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.2005181602120504.a01.pub2. ISBN 0471238961.
^ Büchi, G.; Erickson, R. E.; Wakabyashi, N. (1961). "Terpenes. XVI. Constitution of Patchouli Alcohol and Absolute Configuration of Cedrene". Journal of the American Chemical Society. 83 (4): 927–938. doi:10.1021/ja01465a042.
^ Simonsen, J.; Barton, D. H. R. (1952). The Terpenes. Vol. 111. Cambridge University Press, London.
^ Büchi, G.; Macleod, W. D. (1962). "Synthesis of Patchouli Alcohol". Journal of the American Chemical Society. 84 (16): 3205–3206. doi:10.1021/ja00875a047.
^ Dobler, M.; Dunitz, J. D.; Gubler, B.; Weber, H. P.; Büchi, G. & Padilla, O. J. (1963). "The Structure of Patchouli Alcohol". Proc. Chem. Soc. December: 383. doi:10.1039/PS9630000357.
^ Nicolaou, K. C.; Snyder, S. A. (2005). "Chasing Molecules That Were Never There: Misassigned Natural Products and the Role of Chemical Synthesis in Modern Structure Elucidation". Angewandte Chemie International Edition. 44 (7): 1012–1044. doi:10.1002/anie.200460864. PMID 15688428.

External links

Chime 3D representation

[1] Deguerry, F.; Pastore, L.; Wu, S.; Clark, A.; Chappell, J.; Schalk, M. (2006). "The diverse sesquiterpene profile of patchouli, Pogostemon cablin, is correlated with a limited number of sesquiterpene synthases". Archives of Biochemistry and Biophysics. 454 (2): 123–136. doi:10.1016/j.abb.2006.08.006. PMID 16970904.

[KO-2] Sell, Charles S. (2006). "Terpenoids". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.2005181602120504.a01.pub2. ISBN 0471238961.

[3] Büchi, G.; Erickson, R. E.; Wakabyashi, N. (1961). "Terpenes. XVI. Constitution of Patchouli Alcohol and Absolute Configuration of Cedrene". Journal of the American Chemical Society. 83 (4): 927–938. doi:10.1021/ja01465a042.

[4] Simonsen, J.; Barton, D. H. R. (1952). The Terpenes. Vol. 111. Cambridge University Press, London.

[5] Büchi, G.; Macleod, W. D. (1962). "Synthesis of Patchouli Alcohol". Journal of the American Chemical Society. 84 (16): 3205–3206. doi:10.1021/ja00875a047.

[6] Dobler, M.; Dunitz, J. D.; Gubler, B.; Weber, H. P.; Büchi, G. & Padilla, O. J. (1963). "The Structure of Patchouli Alcohol". Proc. Chem. Soc. December: 383. doi:10.1039/PS9630000357.

[7] Nicolaou, K. C.; Snyder, S. A. (2005). "Chasing Molecules That Were Never There: Misassigned Natural Products and the Role of Chemical Synthesis in Modern Structure Elucidation". Angewandte Chemie International Edition. 44 (7): 1012–1044. doi:10.1002/anie.200460864. PMID 15688428.

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[2]

[3]

[4]

[5]

[6]

[7]

Structure determination

See also

References

External links