ORGANIC DEUTERIUM COMPOUNDS: XVI. SYNTHESIS OF α-DEUTERATED ALKYL NITRILES
作者:L. C. Leitch
DOI:10.1139/v57-050
日期:1957.4.1
A method of preparing α-deuterated alkyl nitriles by a base-catalyzed exchange with deuterium oxide is described. The products are convenient starting materials for the preparation of α-deuterated acids and alkyl bromides.
Ruthenium-catalyzed selective α-deuteration of aliphatic nitriles using D<sub>2</sub>O
作者:Varadhan Krishnakumar、Chidambaram Gunanathan
DOI:10.1039/c8cc03971b
日期:——
Selective catalytic α-deuteration of aliphatic nitriles usingdeuterium oxide as a deuteriumsource is reported. A PNP–ruthenium pincer complex catalyzed the α-deuteration of aliphatic nitriles including acetonitrile. Efficient deuteration occurred with a low catalyst load (0.2 to 0.5 mol%) and under mild conditions. A [2+2] cycloadduct formation from nitrile functionality and a deprotonated catalytic
gamma-halocarbanions that undergo fast intramolecular substitution of the halogen to produce substituted cyclopropanes. We found that these short-lived carbanionic intermediates can be trapped with active external electrophilic partners, such as aldehydes, to give the aldol anions. These anions then undergo rapid intramolecular substitution of chloride to produce 2,3-disubstituted tetrahydrofurans. Under the right
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