272442-14-5Relevant articles and documents
Synthesis and use of deuterated palmitic acids to decipher the cryptoregiochemistry of a Δ13 desaturation
Abad, Jose-Luis,Serra, Montserrat,Camps, Francisco,Fabrias, Gemma
, p. 760 - 764 (2007)
(Chemical Equation Presented) The synthesis of two hexadeuterated palmitic acids differing in the position of the diagnostic labels, and their use to decipher the cryptoregiochemistry of a Δ13 desaturation are described. A dithiane and a triple bond functionalities were used to introduce the diagnostic (C 13 or C14) and tagging (C8 and C9) labels, respectively, in the palmitic acid skeleton. Using these probes, the cryptoregiochemistry of the Δ13 desaturation involved in the biosynthesis of Thaumetopoea pityocampa sex pheromone was studied by means of kinetic isotope effect determinations. Transformation of both (Z)-11-hexadecenoic and 11-hexadecynoic acids into (Z, Z)-11,13-hexadecadienoic and (Z)-13-hexadecen-11-ynoic acids, respectively, is initiated by abstraction of the hydrogen atom at the C13 position, followed by the fast elimination of the C14 hydrogen to give the double bond.
Mild and Direct Multiple Deuterium-Labeling of Saturated Fatty Acids
Yamada, Tsuyoshi,Park, Kwihwan,Yasukawa, Naoki,Morita, Kosuke,Monguchi, Yasunari,Sawama, Yoshinari,Sajiki, Hironao
supporting information, p. 3277 - 3282 (2016/10/21)
We have established a mild and direct platinum on carbon (Pt/C)-catalyzed multi-deuterium labeling of various saturated fatty acids including bioactive compounds with high deuterium efficiencies in a mixed solvent of isopropyl alcohol and deuterium oxide
Synthesis and use of stereospecifically deuterated analogues of palmitic acid to investigate the stereochemical course of the Δ11 desaturase of the processionary moth
Abad, Jose-Luis,Villorbina, Gemma,Fabrias, Gemma,Camps, Francisco
, p. 7108 - 7113 (2007/10/03)
Thaumetopoea pityocampa pheromone glands contain desaturases that, after several sequential reactions from palmitic acid, catalyze the formation of a unique enyne fatty acid, which is the immediate sex pheromone precursor. In this article, we describe the synthesis of different stereospecifically deuterium-labeled and isotopically tagged palmitic acid probes needed to decipher the stereochemical course of the T. pityocampa Δ11 desaturase. The synthesis of probes has been carried out by a chemoenzymatic route, in which the key step is the kinetic lipase-catalyzed resolution of racemic mixtures of secondary propargyl alcohols. The presence of the acetylenic bond simplifies the absolute configuration determination of the resolved alcohols. Moreover, it allows the introduction of the isotopic tag by deuteration. By use of the probes thus prepared, experimental evidence is presented that the Δ11 desaturase of T. pityocampa transforms palmitic acid into (Z)-11-hexadecenoic acid by removal of the pro-(R)-hydrogen atoms from both C11 and C12.