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
作者:Simone Lucarini、Matteo Alessi、Annalida Bedini、Giorgia Giorgini、Giovanni Piersanti、Gilberto Spadoni
DOI:10.1002/asia.200900441
日期:2010.3.1
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
使用钯/碳对烯酰胺N-(4-苯基-3,4-二氢萘-2-基)丙酰胺(2 a)进行清洁,有效和非对映选择性(dr > 95%)催化氢化。此程序提供了褪黑激素受体配体(±)-顺式-4-苯基-2-丙酰胺基四氢萘(顺式-4-P-PDOT,1 a)及其8-甲氧基类似物。此外,研究了Rh和Ru催化的具有几个手性膦配体的具有挑战性的外消旋环内酰胺2a的均相不对称氢化。当将手性Rh-Josiphos用作催化剂时,两种非对映异构体的对映选择性均达到最佳结果。