2-n-pentyl-5-cyclopentylidenecyclopentanone 在
钯氮 、 silica gel 作用下,
以
乙醇 为溶剂,
25.0~35.0 ℃
、13.33 MPa
条件下,
反应 8.0h,
以to give 62.2 g of 2-n-pentyl-5-cyclopentylcyclopentanone with a purity of 99.5%的产率得到2-n-pentyl-5-cyclopentylcyclopentanone
Perfume compositions and 3,6-dicyclopentyl-ò-valero-lactone
申请人:Watanabe Kazunori
公开号:US20070027061A1
公开(公告)日:2007-02-01
A perfume composition containing a 3,6-disubstituted δ-valerolactone having fresh, fruity and floral musk-like fragrance, and 3,6-dicyclopentyl-δ-valerolactone. Specifically, the perfume composition contains a 3,6-disubstituted δ-valerolactone represented by formula [1]:
wherein at least one of R
1
and R
2
represents cyclopentyl group, cyclopentenyl group, cyclohexyl group or cyclohexenyl group and, when only one of R
1
and R
2
represents cyclopentyl group, cyclopentenyl group, cyclohexyl group or cyclohexenyl group, the other of R
1
and R
2
represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aralkyl group having 6 to 10 carbon atoms or an alkylaryl group having 6 to 10 carbon atoms; and aforesaid 3,6-Dicyclopentyl-δ-valerolactone is represented by formula [2]:
A novel cyclopentanone derivative having a cyclopentanone or cyclopentanol ring having substituents at the 2- and 5-positions is provided. The cyclopentanone derivative preferably has 13 to 17 carbon atoms. A perfume composition comprising the cyclopentanone derivative emits a flora fragrance emphasizing a natural and fresh feeling. It is useful for perfuming a variety of toiletries and households. A process for preparing the above-mentioned cyclopentanone derivative is also provided by which the cyclopentanone derivative can be obtained in a practically acceptable yield.
PERFUME COMPOSITIONS AND 3,6-DICYCLOPENTYL-DELTA-VALERO- LACTONE
申请人:ZEON CORPORATION
公开号:EP1609845A1
公开(公告)日:2005-12-28
A perfume composition containing a 3,6-disubstituted δ-valerolactone having fresh, fruity and floral musk-like fragrance, and 3,6- dicyclopentyl-δ-valerolactone. Specifically, the perfume composition contains a 3,6-disubstituted δ-valerolactone represented by formula [1]:
wherein at least one of R1 and R2 represents cyclopentyl group, cyclopentenyl group, cyclohexyl group or cyclohexenyl group and, when only one of R1 and R2 represents cyclopentyl group, cyclopentenyl group, cyclohexyl group or cyclohexenyl group, the other of R1 and R2 represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aralkyl group having 6 to 10 carbon atoms or an alkylaryl group having 6 to 10 carbon atoms; and aforesaid 3,6-Dicyclopentyl-δ-valerolactone is represented by formula [2]: