Stereochemistry of 10-sulfoxidation catalyzed by a soluble Δ9 desaturase
作者:Amy E. Tremblay、Nigel Tan、Ed Whittle、Derek J. Hodgson、Brian Dawson、Peter H. Buist、John Shanklin
DOI:10.1039/b921753c
日期:——
The stereochemistry of castor stearoyl-ACP Î9 desaturase-mediated 10-sulfoxidation has been determined. This was accomplished by 19F NMR analysis of a fluorine-tagged product, 18-fluoro-10-thiastearoyl ACP S-oxide, in combination with a chiral solvating agent, (R)-AMA. Sulfoxidation proceeds with the same stereoselectivity as hydrogen removal from the parent stearoyl substrate. These data validate the use of thia probes to determine the stereochemistry and cryptoregiochemistry of desaturase-mediated oxidations.