Deuterium labelling of a number of ketones was achieved on a preparative scale by a microwave-assisted deuteriumexchangereaction with D2O/CF3COOD. The reaction was rapid (<15 min) and highly isotope-efficient (ca. 100%), even though deuterium incorporation can be decreased during work-up (85–90%). No exchangereaction was observed for aryl protons of aromatic ketones.
通过与D 2 O / CF 3 COOD进行微波辅助的氘交换反应,可以在制备规模上实现许多酮的氘标记。该反应快速(<15分钟)且同位素效率高(约100%),即使在后处理过程中可以减少氘的掺入(85-90%)。没有观察到芳族酮的芳基质子的交换反应。
Isotopically sensitive branching and its effect on the observed intramolecular isotope effects in cytochrome P-450 catalyzed reactions: a new method for the estimation of intrinsic isotope effects
作者:Jeffrey P. Jones、Kenneth R. Korzekwa、Allan E. Rettie、William F. Trager
DOI:10.1021/ja00282a037
日期:1986.10
clarifies the interplay between a branched reaction pathway and the equilibration of an enzyme-substrate complex, in determining the magnitude of an observed isotope effect. An equation is derived that allows limits to placed on the intrinsic isotope effect. The equation is based on the observed isotope effect and the regioselectivity of a branch reaction pathway, catalyzed by an enzyme that forms
Optically active compounds containing a deuterated chiral alkyl ester group [(R)-ArCOOCD(CD3)CD2-n-C5H11, ArCOOCH(CD3)CD2-n-C5H11, ArCOOCD(CH3)-n-C6H13: Ar = n-C8H17OC6H4C6H4COOC6H4] were prepared from 2-octanone and were proved to exhibit liquid crystal phases (Cr 73 SmCA* 117 SmC* 122 SmA 149 Iso) same as the parent compound [(R)-ArCOOCH(CH3)-n-C6H13].
含有氘代手性烷基酯基团的光学活性化合物 [(R)-ArCOOCD(CD3)CD2-n-C5H11, ArCOOCH(CD3)CD2-n-C5H11, ArCOOCD(CH3)-n-C6H13: Ar = n-C8H17OC6H4C6H4COOC6H4] 是通过从 2-辛酮合成的,并被证明具有与母化合物 [(R)-ArCOOCH(CH3)-n-C6H13] 相同的液晶相 (Cr 73 SmCA* 117 SmC* 122 SmA 149 Iso)。
NMR-monitoring of H/D exchange reaction of ketones in solutions of imidazolium ionic liquids
作者:Astghik A. Shahkhatuni、Aleksan G. Shahkhatuni、Valentine P. Ananikov、Arpine S. Harutyunyan
DOI:10.1016/j.molliq.2022.119746
日期:2022.9
NMR spectroscopy was used to study hydrogen–deuterium exchange in CH3, CH2 and CH moieties of ketones dissolved in mixtures of solvents containing exchangeable deuteriums and imidazoliumionicliquids (IL) acting as catalysts. Factors affecting the efficiency of the exchange, as well as the role of the deuterated solvent, temperature and concentration, were investigated. Depending on the sample composition