Chemicals undecylenic acid

It is commonly used in medications for fungal skin infections such as athlete s foot and ringworm. The original medication containing undecylenic acid was named Desenex , based on a shortened version of the chemical name. 

Boukherroub R, Morin S, Wayner DDM, Bensebaa F, Sproule Gl, Baribeau JM, Lockwood DJ (2001) Ideal passivation of luminescent porous silicon by thermal, noncatalytic reaction with alkenes and aldehydes. Chem Mater 13 2002-2011 Boukherroub R, Wojtyk JTC, Wayner DDM, Lockwood DJ (2002) Thermal hydrosilylation of undecylenic acid with porous silicon. J Electrochem Soc 149 59-63 Boukherroub R, Petit A, Loupy A, Chazalviel JN, Ozanam F (2003) Microwave-assisted chemical functionalization of hydrogen-terminated porous silicon surfaces. J Phys Chem B 107 13459-13462... 

L-a Glycerophosphorylcholine cadmium chloride complex was prepared by hydrolyzing egg lecithin which was isolated from egg yolk. 1-Dodecyne, undecylenic acid, 11-bromo undecanoic acid, nonanoic acid, lithium acety-lide ethylenediamine complex, dimethylaminopyridine (DMAP), and dicyclo-hexylcarbodiimide (DCC) were purchased from Aldrich Chemical Co. Milwaukee, WI. Tridecyne was obtained from Farchan Laboratories, Gainesville, FL, and 1,2-dihexanoyl and 1,2-dipalmitoyl PC were purchased from Avanti Polar Lipids, Birmingham, AL. Mixed bed resin AG 501-X8(D) was procured from Bio-Rad Laboratories, Richmond, CA. Chloroform was distilled freshly over phosphorus pentoxide just before the use. Other solvents were used as received. The water was triply distilled and deionized. 

Internal stabilization with lead undecylenate appears to be caused for similar reasons. As can be seen in Figure 9, the carbonyl band of the incorporated salt group (obtained from a KBr briquet sample of the copolymer) appears at 1540 cm.-1. The intensity of this absorption band decreases with time of heat treatment. At the same time a band appears at 1730 cm."1 which, in analogy to the investigations of Frye and Horst (10), is to be attributed to formation of ester groups in the polymers. Accordingly, there seems to be no basic difference between the stabilizing action of admixed and of chemically incorporated lead salts of aliphatic carboxylic acids. 

The pyrolysis step is not particularly efficient at yielding methyl undecylenate [7] straightforward techniques lead to low yields of 17-35% whereas newer techniques can reach values between 45-50%. By including these process values and starting chemical composition, the overall yield to undecenoic acid is rather low 15-20% of the original castor bean mass. 

---