One-step replacement of NH2 groups in ring-substitutedanilines by deuterium is reported. Approaches comprising both solid-phase and solution-phase syntheses can be used on a large variety of substrates. The method uses diazotization in a mixture of water and either dichloromethane or chloroform, which serve as a source of hydrogen. This protocol can be used as a general method for fast and easy incorporation
The practical utility of decarboxylative transformations in organic synthesis is discussed, and the decarboxylative deuteration of (hetero)aromatic carboxylic acids is disclosed as a further example. Various monodeuterated arenes were synthesized under mild conditions, in a single step from easily accessible aromatic carboxylic acids and deuterium oxide. Copper catalysts were found to have the widest scope, but silver catalysts are superior for some ortho-substituted benzoates. A few substrates, e.g. quinoline-2-carboxylic acid, decarboxylate even in the absence of a metal catalyst.
A visible-light-photocatalytic water-splitting strategy for sustainable hydrogenation/deuteration of aryl chlorides
作者:Xiang Ling、Yangsen Xu、Shaoping Wu、Mofan Liu、Peng Yang、Chuntian Qiu、Guoqiang Zhang、Hongwei Zhou、Chenliang Su
DOI:10.1007/s11426-019-9672-8
日期:2020.3
chlorides instead of using flammable H2. When applying heavy water-splitting systems, we could selectively install deuterium at the C−Cl position of aryl chlorides under mild conditions for the sustainable synthesis of high-valued added deuterated chemicals. Sub-micrometer Pd nanosheets (Pd NSs) decorated crystallined polymeric carbon nitrides (CPCN) is developed as the bifunctional photocatalyst,
Visible Light Driven Hydro-/Deuterodefunctionalization of Anilines
作者:Michal Majek、Fabiana Filace、Axel Jacobi von Wangelin
DOI:10.1002/chem.201406461
日期:2015.3.16
report on visiblelightmediated hydro‐ and deuterodediazonations in solutions of DMF. The mild reaction conditions (DMF, RT, no additives) tolerate various functional groups and allow the site‐specific introduction of D atoms to the arene. Mechanistic investigations indicate the participation of photoredox and radical chain pathways and competing abstraction of methyl and formyl hydrogenatoms from DMF
Catalytic selective deuteration of halo(hetero)arenes
作者:Manojkumar Janni、S. Peruncheralathan
DOI:10.1039/c6ob00193a
日期:——
Deuterium labeled aromatic and heteroaromatic compounds are synthesized in good to excellent yields with >98% deuterium purity via palladium catalyzed deuterodehalogenation reaction using commercially available and inexpensive reagents. Selectivedeuteration of bromoaniline is also demonstrated without H/D exchange in an amino N–H group.