1-Octadecene alkylation with

Sun X, Zhao S (2006) [BMlM]Cl/[FeCy Ionic liquid as catalyst for alkylation of benzene with 1-octadecene. Chin J Chem Eng 14(3) 289-293... 

In nature one also finds chiral fatty acid or fatty alcohol derivatives with a hydroxyl or amino substituent at the alkyl chain. Common examples are given in Table 2.2.2 of the fatty acids in cheap commercial castor oil (a fat mixture) consist of ricinoleic acid (12-/ -hydroxy-9-Z-octadecene-carboxylic acid). The hydrogenation product (R)-12-hydroxy-stearic acid is the cheapest chiral fatty acid (about 100/g). Sphingosin (2-S-amino-4-E-octadecene-l,3-R-diol) is a chiral a--arnino-diol, which is found in large amounts in nerve tissue ( 5,000/g). Chirality is expensive, if it is localized within the hydrophobic chain. 

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