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.
蓖麻酸酰基-ACP Δ9 去饱和酶介导的10-亚砜化的立体化学已经确定。通过氟标记产物18-氟-10-硫酸酰基ACP S-氧化物的19F NMR分析,结合手性溶剂(R)-AMA,完成了这一研究。亚砜化过程展现出与母体硬脂酸底物去氢相同的立体选择性。这些数据验证了使用硫探针来确定去饱和酶介导的氧化反应的立体化学和隐蔽区域化学的有效性。