[EN] PROCESS FOR PREPARING BICYCLIC AMINE DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS D'AMINE BICYCLIQUE
申请人:ABBVIE INC
公开号:WO2014008350A1
公开(公告)日:2014-01-09
The present invention provides a process for preparing a bicyclic amine derivative of the for-mula (Ia) or (Ib), (Formulae (Ia) (Ib)) comprising the rhodium-catalyzed asymmetric hydrogenation of an enamine of the formula (II), (Formula (II)) in the presence of a chiral ligand, wherein the chiral ligand is a chiral phosphine ligand.
A novel, efficient and diastereoselective procedure was developed for the gram-scale synthesis of cis-4-phenyl-2-propionamidotetralin (4-P-PDOT), a selective MT(2) melatonin receptor antagonist. The synthetic strategy involved the conversion of 4-phenyl-2-tetralone to enamide followed by diastereoselective reduction affording cis-4-P-PDOT in good yield. The mechanism of the reduction step was explored
The present invention provides a process for preparing a bicyclic amine derivative of the formula (Ia) or (Ib),
comprising the rhodium-catalyzed asymmetric hydrogenation of an enamine of the formula (II),
in the presence of a chiral ligand, wherein the chiral ligand is a chiral phosphine ligand.
Diastereo- and Enantioselective Hydrogenation of a Challenging Enamide Derived from 4-Phenyl-2-tetralone: An Appealing Shortcut Towards Enantiopure<i>cis</i>-2-Aminotetraline Derivatives
catalytic hydrogenation of the enamide N‐(4‐phenyl‐3,4‐dihydronaphthalen‐2‐yl)propionamide (2 a) using palladium on carbon is performed. This procedure provides the melatonin receptor ligand (±)‐cis‐4‐phenyl‐2‐propionamidotetralin (cis‐4‐P‐PDOT, 1 a) and its 8‐methoxy analog. Furthermore, Rh and Ru catalyzed homogeneous asymmetric hydrogenation of the challenging racemic endocyclic enamide 2 a with