An asymmetric reductive amination of ketones using both arylamines and benzhydrazide in the presence of nickel catalysts was developed. A one‐pot synthesis of tetrahydroquinoxalines was also developed starting directly from α‐ketoaldehydes and 1,2‐diaminobenzene. Formic acid was used as a safe and economic surrogate for high‐pressure hydrogen gas. Strongly σ‐donating bis(alkylphosphine)s are crucial
Mrsic, Natasa; Minnaard, Adriaan J.; Feringa, Ben L., Journal of the American Chemical Society, 2009, vol. 131, p. 8358 - 8359
作者:Mrsic, Natasa、Minnaard, Adriaan J.、Feringa, Ben L.、Vries, Johannes G. de
DOI:——
日期:——
New P,N-Ferrocenyl Ligands for the Asymmetric Ir-Catalyzed Hydrogenation of Imines
作者:Murthy N. Cheemala、Paul Knochel
DOI:10.1021/ol071168t
日期:2007.8.1
The Ir-catalyzed enantioselective hydrogenation of various N-(3,5-dimethyl-4-methoxy)phenylimines was performed under mild conditions in the presence of new P,N-ferrocenyl iridium complexes leading to (R)-N-(3,5-dimethyl-4-methoxy)phenylamines in high yields and enantioselectivities (up to 99%). These chiral aryl amines can be readily deprotected using Ce(NH4)2(NO3)6.