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
[reaction: see text] A novel, biomimetic concept for the direct reductiveamination of ketones is described that relies on selective imine activation by hydrogen bond formation. The mild, acid- and metal-free process requires only catalytic amounts of thiourea as hydrogen bond donor and utilizes the Hantzsch ester for transfer hydrogenation. The method allows the efficient synthesis of structurally
Solvent- and catalyst-free direct reductive amination of aldehydes and ketones with Hantzsch ester: synthesis of secondary and tertiary amines
作者:Quynh Pham Bao Nguyen、Taek Hyeon Kim
DOI:10.1016/j.tet.2013.04.046
日期:2013.6
A facile and rapid method for the parallel synthesis of a series of secondary and tertiary amines by the direct reductiveamination of aldehydes and ketones with Hantzsch ester under solvent- and catalyst-free has been developed. The scope and limitation of this method are described.
S-Benzyl Isothiouronium Chloride as a Recoverable Organocatalyst for the Direct Reductive Amination of Ketones with Hantzsch Ester
作者:Taek Kim、Quynh Nguyen
DOI:10.1055/s-0031-1291125
日期:2012.7
presence of S-benzyl isothiouronium chloride as a recoverableorganocatalyst is reported. A wide range of ketones as well as amines were found to give the expected products in moderate to excellent yields. The direct reductive amination of ketones using the Hantzsch ester in the presence of S-benzyl isothiouronium chloride as a recoverableorganocatalyst is reported. A wide range of ketones as well as