Palladium-Catalyzed Enantioselective Three-Component Synthesis of α-Substituted Amines
作者:Tamara Beisel、Georg Manolikakes
DOI:10.1021/acs.orglett.5b01502
日期:2015.6.19
palladium-catalyzed, enantioselective three-component synthesis of α-arylamines starting from sulfonamides, aldehydes, and arylboronic acids has been developed. These reactions generate a wide array of α-arylamines with high yields and enantioselectivities. Notably, this process is tolerant to air and moisture, providing an operationally simple approach for the synthesis of chiral α-arylamines.
The asymmetric arylation of N-tosylarylimines with arylboronic acids was realized by using rhodium/(S)-ShiP as catalyst. The reaction proceeded in aqueous toluene to give diarylmethylamines in good yields with up to 96% ee.
Catalytic Enantioselective Arylation of <i>N</i>-Tosylarylimines with Arylboronic Acids Using <i>C</i><sub>2</sub>-Symmetric Cationic <i>N</i>-Heterocyclic Carbene Pd<sup>2+</sup> Diaquo Complexes
作者:Guang-Ning Ma、Tao Zhang、Min Shi
DOI:10.1021/ol802861s
日期:2009.2.19
The asymmetric arylation of N-tosylimines with arylboronic acids was realized by using chiral cationic C-2-symmetric N-heterocyclic carbene (NHC) Pd2+ diaquo complex 5b as the catalyst in combination with 1.0 equiv of K3PO4 center dot 3H(2)O in THF at 4 degrees C in the presence of powdered 4 angstrom MS to afford the corresponding adducts in excellent yields (up to 99%) and good to high enantioselectivities (up to 94% ee).
Enantioselective palladium-catalyzed arylation of N-tosylarylimines with arylboronic acids using a chiral 2,2′-bipyridine ligand
作者:Xiang Gao、Bo Wu、Zhong Yan、Yong-Gui Zhou
DOI:10.1039/c5ob02330k
日期:——
With the aid of an axially chiral 2,2′-bipyridine ligand, we have successfully developed a palladium-catalyzed method for the enantioselective arylation of N-tosylarylimines, furnishing the chiral diarylmethamines with high yields and enantioselectivities under very mild conditions. An exogenous base was avoided and imine hydrolysis was inhibited in this transformation.
A highly efficient and accessible synthesis of chiral 3-substitutedisoindolinoneframeworks is described. The synthesis involved the Rh(I)-catalyzed asymmetric arylation of boronic acids to 2-halobenzaldimines and the subsequent Rh(I)-catalyzed intramolecular aminocarbonylation of the resulting 2-halobenzylamines using an aldehyde as the carbonyl source. The method tolerates a variety of functional