ゼオンのキラルラクトン


(http://www.zeon.co.jp/business/enterprise/spechemi/spechemi3-1.html)からのメモ
ゼオンはラクトン類やグリーン香調を持つC6アルデヒド/アルコール/エステルを商品として持っており、販売している。ラクトン類はキラルコントロールしたものもあり、合成技術の高さを感じる。

delta-Decalactone

Delta LACTONES, which naturally occur in many kinds of foods, are indispensable for creating various flavor and fragrance compounds.

Many flavor and fragrance components have chiral structures, which show optical activity, and well-known that the odor quality of optically active substances is much superior to that of racemic compounds.

ZEON CORPORATION has successfully developed the synthetic process of manufacturing the optically active delta-Decalactone and commercially launched two types of enantiomers R-body and S-body.
Using the optically active delta-Decalactone in compounds makes it possible to reproduce really natural flavors and fragrances that have been impossible to create only with racemic compounds.

■PHYSICAL PROPERTIES
Formula   C10H18O2
Flash point 148C°(Open cap)

■ANALYTICAL SPECIFICATIONS
Purity(GC%)   min. 98.0%
Optical purity(ee) 80.0% ~ 83.0% ee
Specific gravity(d20/20) 0.969 ~ 0.975
Refractive index(n20/D)   1.455 ~ 1.460
Acid value(mg KOH/g)   max. 5.0

■REGISTRATION
CAS NO.   705-86-2
TSCA listed
EINECS NO. 2118891
FEMA GRAS NO.   2361
H.S.TARIFF NO.   2932.29

■Stereodifferentiation of delta-Decalactone in natural products
Food   R : S
Cheddar cheese 71.8 : 28.2 (43.6%ee)
Osmanthus oil 83.8 : 16.2 (67.6%ee)
Peach   97.0 :3.0 (94.0%ee)
Raspberry   2.2 : 97.8 (95.6%ee)

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