Acid-Assisted Ru-Catalyzed Enantioselective Amination of 1,2-Diols through Borrowing Hydrogen
作者:Li-Cheng Yang、Ya-Nong Wang、Yao Zhang、Yu Zhao
DOI:10.1021/acscatal.6b02959
日期:2017.1.6
Here, we present a highly enantioselectivesynthesis of 1,2-amino alcoholsfrom readily available racemic 1,2-diols through a borrowinghydrogen process. An intriguing acid effect was discovered for this Ru-catalyzed amination reaction, which led to a significant improvement of the stereoselectivity of the process. Preliminary mechanistic studies suggest a scenario of Brønsted acid-assisted dynamic
Ruthenium-Catalyzed Enantioselective Synthesis of β-Amino Alcohols from 1,2-Diols by “Borrowing Hydrogen”
作者:Anggi Eka Putra、Yohei Oe、Tetsuo Ohta
DOI:10.1002/ejoc.201300692
日期:2013.9
Enantioselectivesynthesis of β-amino alcohols from 1,2-diols by the use of [RuCl2(p-cymene)]2/(S,R)-JOSIPHOS catalysis was developed. Several 1,2-diols were treated with secondary amines to afford the corresponding optically active β-amino alcohols in up to 99 % yield with 77 % ee.
One‐Pot Synthesis of Chiral 1‐Aryl‐2‐Aminoethanols via Ir‐Catalyzed Asymmetric Hydrogenation
作者:Lei Zhang、Liming Cao、Maolin Sun、Chaoming Liang、Lei Yang、Yueyue Ma、Ruihua Cheng、Jinxing Ye
DOI:10.1002/chem.202300367
日期:——
The one-pot protocol involving the in situ generation of α-amino ketones via the nucleophilic substitution of α-bromoketones with amines and the Ir-catalyzed asymmetric hydrogenation of ketone intermediates was developed for the asymmetric synthesis of a diverse array of chiral β-amino alcohols with excellent results.
一锅法涉及通过用胺亲核取代 α-溴酮原位生成 α-氨基酮和 Ir 催化的酮中间体不对称氢化,用于不对称合成多种手性 β-氨基醇类,效果极佳。