Cedrene

Cedrene is a sesquiterpene found in the essential oil of cedar. The two isomers present in the oil are (−)-α-cedrene[3][4] and (+)-β-cedrene,[5] which differ in the position of a double bond.

(−)-α-cedrene

Names
IUPAC name (1S,2R,5S,7R)-2,6,6,8-tetramethyltricyclo[5.3.1.0^1,5]undec-8-ene
Other names Cedr-8-ene
Identifiers
CAS Number	11028-42-5 469-61-4 (α) 546-28-1 (β)
3D model (JSmol)	Interactive image
Beilstein Reference	2207578
ChEBI	CHEBI:10216
ChemSpider	4936353
ECHA InfoCard	100.031.131
EC Number	234-257-7
KEGG	C09630
PubChem CID	6431015
UNII	1M4BF4O9SA 50D4A81G8T (α) 6QL7ERD5Q1 (β)
CompTox Dashboard (EPA)	DTXSID0047032
InChI InChI=1S/C15H24/c1-10-7-8-15-9-12(10)14(3,4)13(15)6-5-11(15)2/h7,11-13H,5-6,8-9H2,1-4H3/t11-,12+,13+,15+/m1/s1 Key: IRAQOCYXUMOFCW-OSFYFWSMSA-N InChI=1/C15H24/c1-10-7-8-15-9-12(10)14(3,4)13(15)6-5-11(15)2/h7,11-13H,5-6,8-9H2,1-4H3/t11-,12+,13+,15+/m1/s1 Key: IRAQOCYXUMOFCW-OSFYFWSMBF
SMILES C[C@@H]1CC[C@@H]2[C@]13CC=C([C@H](C3)C2(C)C)C
Properties
Chemical formula	C15H24
Molar mass	204.357 g·mol^−1
Density	0.932 g/mL at 20 °C[1]
Boiling point	261–262 °C[1]
Hazards
GHS pictograms
GHS Signal word	Danger
GHS hazard statements	H226, H304, H400, H410
GHS precautionary statements	P210, P233, P240, P241, P242, P243, P273, P280, P301+310, P303+361+353, P331, P370+378, P391, P403+235, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

(+)-β-cedrene

Names
IUPAC name (1S,2R,5S,7R)-2,6,6-trimethyl-8-methylidenetricyclo[5.3.1.0(1,5)]undecane
Identifiers
CAS Number	546-28-1
3D model (JSmol)	Interactive image
ChemSpider	9281621
ECHA InfoCard	100.031.131
PubChem CID	11106485
UNII	6QL7ERD5Q1
CompTox Dashboard (EPA)	DTXSID0047032
InChI InChI=1S/C15H24/c1-10-7-8-15-9-12(10)14(3,4)13(15)6-5-11(15)2/h11-13H,1,5-9H2,2-4H3/t11-,12+,13+,15+/m1/s1 Key: DYLPEFGBWGEFBB-OSFYFWSMSA-N InChI=1/C15H24/c1-10-7-8-15-9-12(10)14(3,4)13(15)6-5-11(15)2/h11-13H,1,5-9H2,2-4H3/t11-,12+,13+,15+/m1/s1 Key: DYLPEFGBWGEFBB-OSFYFWSMBA
SMILES C[C@@H]1CC[C@@H]2[C@]13CCC(=C)[C@H](C3)C2(C)C
Properties
Chemical formula	C15H24
Molar mass	204.357 g·mol^−1
Density	0.932 g/mL at 20 °C[2]
Boiling point	263–264 °C[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

See also

• Cedrol, another component of cedar oil

References

1. Sigma-Aldrich Co., (−)-α-Cedrene. Retrieved on 8 July 2012.
2. Sigma-Aldrich Co., (+)-β-Cedrene. Retrieved on 8 July 2012.
3. Lee, H. Y.; Lee, S.; Kim, D.; Kim, B. K.; Bahn, J. S.; Kim, S. (1998). "Total synthesis of α-cedrene: A new strategy utilizing N-Aziridinylimine radical chemistry". Tetrahedron Letters. 39 (42): 7713–7716. doi:10.1016/S0040-4039(98)01680-3.
4. Takigawa, H.; Kubota, H.; Sonohara, H.; Okuda, M.; Tanaka, S.; Fujikura, Y.; Ito, S. (1993). "Novel Allylic Oxidation of alpha-Cedrene to sec-Cedrenol by a Rhodococcus Strain". Applied and Environmental Microbiology. 59 (5): 1336–1341. PMC 182086. PMID 16348930.
5. Kerr, W. J.; McLaughlin, M.; Morrison, A. J.; Pauson, P. L. (2001). "Formal total synthesis of (+/-)-alpha- and beta-cedrene by preparation of cedrone. Construction of the tricyclic carbon skeleton by the use of a highly efficient intramolecular Khand annulation". Organic Letters. 3 (19): 2945–2948. doi:10.1021/ol016054a. PMID 11554814.