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
The catalytic transfer hydrogenation of imines and the reductive amination of carbonyl compounds have been thoroughly investigated with a cyclooctene‐derived (cyclopentadienone)iron pre‐catalyst. Additionally, enantioselective ketimine reduction with a chiral (cyclopentadienone)ironcomplex is reported here for the first time.
Development of highly enantioselective new Lewis basic N-formamide organocatalysts for hydrosilylation of imines with an unprecedented substrate profile
作者:Pengcheng Wu、Zhouyu Wang、Mounuo Cheng、Li Zhou、Jian Sun
DOI:10.1016/j.tet.2008.09.034
日期:2008.12
ketimines and non-methyl ketimines were catalyzed to afford the desired amines in good to high yield and enantioselectivity. In particular, catalyst 6e enabled the reduction of the difficult bulky ketimines to be highly efficient and enantioselective, affording up to 99% yield and 97% ee. This catalyst proved to prefer the relatively bulkier non-methyl acyclic ketimines to the methyl ketimines as substrate
Borane-Catalyzed Chemoselectivity-Controllable N-Alkylation and <i>ortho</i> C-Alkylation of Unprotected Arylamines Using Benzylic Alcohols
作者:Shan-Shui Meng、Xiaowen Tang、Xiang Luo、Ruibo Wu、Jun-Ling Zhao、Albert S. C. Chan
DOI:10.1021/acscatal.9b03038
日期:2019.9.6
efficient and highlychemoselective alkylation of unprotected arylamines using alcohols catalyzed by B(C6F5)3 has been developed. The reaction gives N-alkylated products and ortho C-alkylated products in different solvents in good chemoselectivities and yields. Control experiments and DFT calculations indicated that the borane underwent alcohol/arylamine exchange to ensure catalytic activity, and a
已经开发出一种空前的方案,用于使用受B(C 6 F 5)3催化的醇对未保护的芳基胺进行高效且高度化学选择性的烷基化反应。该反应在不同溶剂中以良好的化学选择性和收率得到N-烷基化产物和邻C-烷基化产物。控制实验和DFT计算表明,硼烷进行了醇/芳基胺交换以确保催化活性,并提出了涉及碳正离子化的可能机理。