Citronellal/citronellol

The Rh(I)-catalyzed isomerization of prochiral allylic amines to optically active enamines is used for the giant-scale synthesis of citronellal, citronellol, menthol, and other fragrances (18)(Chapter 3). 7-Meth-oxydihydrocitronellal, thus prepared, is an insect growth regulator. All of these processes can be carried out economically and with extremely high optical yields. 

For the hydrogenation of citral different reaction products, e.g. citronellal, citronellol, geraniol and nerol, can be expected ... 

Amyl cinnamic aldehyde Amyl salicylate Anisaldehyde Aurantiol Benzaldehyde Benzyl acetate Benzyl salicylate Brahmanol Cal one Cashmeran Cedramber Cedryl acetate Cinnamic alcohol Citral Citronellal Citronellol Citronellyl acetate Coumarin... 

Eucalyptus citriodora Hook f. Leaves F 2.2-8.3 citronellal, citronellol, isopulegol, 1,8- 68,69... 

Fig. 1. Hydrogenation kinetics of citral at 70 C, a long-time experiment. Symbols ( ) citral, (cis and trans), ( ) citronellal, ( ) citronellol, ( ) nerol and geraniol, ( ) 3,7-dimethyloctanol. The continuous lines represent the fit of the model to the experimental data.

Studies on the house fly, Muaca domeatica, revealed the considerable acute larvicidal activity of several terpenoids, especially carvacrol and d-limonene (19). Several metamorphosis inhibition effects were also observed, including inhibition of pupal ecdysis, uneclosed pupae, and deformed adults. Numerous compounds exhibited potency in these developmental mortalities camphene, carvacrol, carvone, cineole, citral, citronellal, citronellol, eugenol, farnesol, geraniol, limonene, linalool, B-phellandrene, and a-pinene. Egg hatch was also inhibited by exposure to the terpenoids the most effective ovicidal compounds were carvacrol, citronellal and B-phellandrene, with no acutely toxic effects noted to the embryos, but rather show inhibition of development of the embryo and inability to eclose from the egg... 

Myrtaceae a-pinene citronellal, citronellol, linalool, a-terpinene Batish et al. (2006)... 

ISO standard 3849 shows character and data for the Sri Lanka-type oil and ISO standard 3848 for the Java-type oil. Synthetic citronellal, citronellol, and geraniol were used. In addition citronella oil terpenes were used to cover such adulterations. Lawrence (1996a) mentions the ratio of citronellal in Java type with R- +) enantiomer is 90%. Casabianca (1996) found chiral ratio of (/ )-(+)-citronellol and (5)-(-)-citronellol to be 75,0%-79.0% and 21.0%-25.0%, respectively. 

Anisic aldehyde Benzaldehyde Benzyl acetate Benzyl alcohol, B.P. Benzyl benzoate, B.P. Bornyl acetate (wo) Bromstyrol Cinnamic aldehyde Citral Citronellal Citronellol Coumarin... 

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