Styrallyl acetate

The middle part of the perfume is a bouquet of floral notes reduced to their simplest components. Terpineol for lilac, styrallyl acetate for gardenia, phenylethyl alcohol for rose, hydroxycitronellal (10%) for muguet, and benzyl acetate and amyl cinnamic aldehyde for jasmin. 

In Coriandre (Couturier 1973) the top note is of coriander, ylang, styrallyl acetate, and undecylenic aldehyde, with geranium as part of the rose note. The type of rose base, which probably makes up some 10% of the formula, is a classic combination of phenylethyl alcohol, citronellol, geraniol, geranyl acetate, honey notes such as ethyl phenylacetate and phenylethyl phenylacetate, phenylacetaldehyde, rosatol, camomile, and violet leaf. Apart from hydroxycitronellal, Lyral, and phenylacetaldehyde glyceroacetal add to the muguet character. 

As we would expect the perfume is clearly composed around a classical structure of top, middle, and base notes. Apart from all the essential elements of a chypre there is the bold use of strong materials such as citronellal (1%), the aliphatic aldehydes (1%), styrallyl acetate (4%), and styrax in an accord that gives the perfume its enormous individuality. It was also part of Carles s technique to take structural materials such as vetiveryl acetate, methyl ionone, and hydroxycitronellal and dress them up with a number of natural and synthetic ma-... 

Alcohols like 3-methyl-2-buten-l-ol, citronellol, nerol, hotrienol, linalool and 2-phe-nylethanol impart a fresh floral topnote to the whole mango flavour. Artificial mango flavourings may contain diphenyl oxide or styrallyl acetate. 

C10H12O2, Mt 164.20, bpii kpa 92.5 °C, dg 1.0277, ng 1.4954, has not been reported as occurring in nature. It is a liquid with a dry, fruity-green, blossom odor, reminiscent of gardenia. It can occur in the form of optically active enantiomers, but only the racemate is used in perfumery. Styrallyl acetate is a key ingredient in gardenia fragrances and is added to many other blossom compositions, particularly for dry top notes. 

Finally, the esterification reaction with styrallyl alcohol and acetic acid was carried out under natural reaction conditions using esterification catalysts such as citric acid or by means of bioprocess reactions using commercial esterforming enzymes (5). The catalytic conversion of styrallyl alcohol to styrallyl acetate did not change the stereoisomer ratio. The resulting stereoisomeric mixture of styrallyl acetate was recovered and purified by solvent extraction followed by fractional distillation. 

The overall bioprocesses produced a stereoisomeric mixture of natural styrallyl acetate with enantiomeric excess of 87% of the R-isomer. Styrallyl acetate mainly can be used for natural savory, fruit and dairy flavors, and fresh fruity and floral perfume compositions. 

Stypoi 40-3221] Stypoi 40-3910] Stypoi 40-3941] Stypoi 40-4033] Stypoi 40 74] Stypoi 40-5708] Stypoi 40-5732] Stypoi 40-8006] Stypoi 40-8042] Stypoi 83-2000. See Polyester resin, thermosetting Styracin. SeeCinnamyl cinnamate Styrallyl acetate. See a-Methylbenzyl acetate Styrallyl alcohol. See a-Methylbenzyl alcohol Styrallyl propionate. Seeq-Methylbenzyl propionate... 

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