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.
Pd(II)/(S)-t-BuPyOx-catalyzed asymmetric addition of arylboronic acids to N-sulfonyl-arylaldimines
作者:Kaixuan Song、Min Wen、Kai Shen、Chaogang Fan、Zhenyu Yang、Shaohui Lin、Qinmin Pan
DOI:10.1016/j.tetlet.2021.153057
日期:2021.5
The asymmetric version of Pd(II)/bipyridine-catalyzed nucleophilic addition of arylboronic acids to N-sulfonyl arylaldimines was developed, and excellent asymmetric induction was achieved by the use of chiral pyridinooxazoline ligand (S)-t-BuPyOx. Moisture and oxygen-insensitive catalysis was realized under mild conditions, and 9 out of 16 examples gave 92–99% 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).
A Chiral Disulfoxide Ligand for the Efficient Rhodium‐Catalyzed 1,2‐Addition of Arylboroxines to
<i>N</i>
‐Tosylarylimines
作者:Guang‐Zhen Zhao、Gellért Sipos、Alvaro Salvador、Arnold Ou、Pengchao Gao、Brian W. Skelton、Reto Dorta
DOI:10.1002/adsc.201500975
日期:2016.6.2
active pharmaceutical ingredients. Herein, we report a rhodium precatalyst with a chiral disulfoxide ligand that effects the 1,2‐addition of arylboroxines to aromatic imines to give high yields and high enantioselectivities of these products. The present paper describes a system that is very simple, where the ease of synthesis of the chiral ligand is combined with low catalyst loadings and reaction conditions