Organocatalytic Deuteration Induced by the Dynamic Covalent Interaction of Imidazolium Cations with Ketones
作者:Konstantin I. Galkin、Evgeniy G. Gordeev、Valentine P. Ananikov
DOI:10.1002/adsc.202001507
日期:2021.3.2
organocatalytic approach based on the dynamic covalent interaction of imidazolium cations with ketones. A reaction of N‐alkyl imidazolium salts with acetone‐d6 in the presence of oxygenated bases generates a dynamic organocatalytic system with a mixture of protonated carbene/ketone adducts acting as H/D exchange catalysts. The developed methodology of the pH‐dependent deuteration showed high selectivity of labeling
experiments with (2)H- and (13)C-labeled decanoic acid, their 3-oxygenated congeners, and octanoicacid have suggested that 1 is biosynthesized via coupling of a C(5) unit with octanoate, rather than via introduction of a C(3) unit at the alpha position of a decanoate derivative. Further feeding study of [2,3-(13)C(2)]decanoic acid concluded that the former route is operating in the biosynthesis of 1.