Reductive amination of various ketones and aldehydes by transferhydrogenation under aqueous conditions has been developed, by using cyclometallated iridium complexes as catalysts and formate as hydrogen source. The pH value of the solution is shown to be critical for a high catalytic chemoselectivity and activity, with the best pH value being 4.8. In comparison with that in organic solvents, the reductive
Highly Enantioselective Reductive Amination of Simple Aryl Ketones Catalyzed by Ir−f-Binaphane in the Presence of Titanium(IV) Isopropoxide and Iodine
作者:Yongxiang Chi、Yong-Gui Zhou、Xumu Zhang
DOI:10.1021/jo026856z
日期:2003.5.1
Using an Ir-f-Binaphane complex as the catalyst, complete conversions and high enantioselectivies (up to 96% ee) were achieved in the asymmetric reductive amination of aryl ketones in the presence of Ti(O(i)()Pr)(4) and I(2). A simple and efficient method of synthesizing chiral primary amines has been realized.
Single Nucleotide-Catalyzed Biomimetic Reductive Amination
作者:Atul Kumar、Siddharth Sharma、Ram Awatar Maurya
DOI:10.1002/adsc.201000178
日期:2010.9.10
successfully developed a single nucleotide (adenosine 5′‐diphosphate)‐catalyzed enantioselective direct reductiveamination of aldehydes and ketones using a Hantzsch ester as reducing agent. The process is a simple, efficient and a real mimic of the NADH reduction approach for the synthesis of structurally diverse amines. This reaction is the first report demonstrating the ability of a single nucleotide as catalyst
作者:R. Ian Storer、Diane E. Carrera、Yike Ni、David W. C. MacMillan
DOI:10.1021/ja057222n
日期:2006.1.1
The first enantioselectiveorganocatalyticreductive amination reaction has been accomplished. The development of a new chiral phosphoric acid catalyst has provided a convenient strategy for the enantioselective construction of protected primary amines and provided a highly stereoselective method for the reductive amination of heterocyclic amines. A diverse spectrum of ketone and amine substrates can
The present invention relates to an iridium-based catalyst compound for hydrogenating reducible moieties, especially imines and iminiums, the catalyst compounds being defined by the formulas: where ring B is either itself polycyclic, or ring B together with R is polycyclic. The catalysts of the invention are particularly effective in reductive amination procedures
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which involve the in situ generation of the imine or iminium under reductive hydrogenative conditions.