A consecutive process for C–C and C–N bond formation with high enantio-and diastereo-control: direct reductive amination of chiral ketones using hydrogenation catalysts
作者:Sophie H. Gilbert、Virginie Viseur、Matthew L. Clarke
DOI:10.1039/c9cc00923j
日期:——
was observed in the Rh-catalysed reductive amination of 3-arylcyclohexanones to form tertiary amines. This was incorporated into a one-pot enantioselective conjugate addition and diastereoselective reductive amination, including an example of assisted tandemcatalysis.
Enantioselective Synthesis of 2-Aryl-4-piperidones via Rhodium/Phosphoramidite-Catalyzed Conjugate Addition of Arylboroxines
作者:Richard B. C. Jagt、Johannes G. de Vries、Ben L. Feringa、Adriaan J. Minnaard
DOI:10.1021/ol050734m
日期:2005.6.1
[GRAPHICS]The highly enantioselective synthesis of 2-aryl-4-piperidones by rhodium/phosphoramidite-catalyzed conjugate addition of arylboroxines to 2,3-dihydro-4-pyridones is described. Both enantiomers of a variety of products with sterically and electronically different R substituents were obtained in high isolated yield and with excellent enantioselectivity up to 99%.
A New Entry of Nucleophiles in Rhodium-Catalyzed Asymmetric 1,4-Addition Reactions: Addition of Organozinc Reagents for the Synthesis of 2-Aryl-4-piperidones
A rhodium-catalyzedasymmetric 1,4-addition reaction has been applied to the synthesis of 2-aryl-4-piperidones. While other conventional nucleophiles fail, organozinc reagents have been successfully utilized for the construction of these useful compounds in very good yield and enantiomeric excess.