Syntheses of apogalanthamine analogs as α-adrenergic blocking agents.<b>IX</b>. Syntheses of optically active 8-hydroxy-6-methyl-5,6,7,8-tetrahydrodibenz[<i>c,e</i>]azocines
(8R) and (8S)-Hydroxy-6-methyl-5,6,7,8-tetrahydrodibenz[c,e]azocines (R- and S-1) were synthesized by oxidative kinetic resolution of N-(2-iodobenzyl)-β-(2-iodophenyl)ethanolamine (8), followed by cyclization of the opticallyactive acetates (R- and S-6) of R- and S-8 with zero-valent nickel to (8R)- and (8S)-acetoxyazocines (R- and S-7), and by hydrolysis of the acetates (R- and S-7).
The present invention relates to a cyclohexanone derivative of formula
in the form of any one of its isomers or mixture thereof. The invention concerns also the preparation and the use of this derivative. The compounds of the invention are useful starting materials for the preparation of various optically active compounds.
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。