Diastereoselective, large scale synthesis of β-amino acids via asymmetric enamide hydrogenation as α2δ ligands for the treatment of generalized anxiety disorder and insomnia
作者:Javier Magano、Brian Conway、Daniel Bowles、Jade Nelson、Thomas N. Nanninga、Derick D. Winkle、Haifeng Wu、Michael H. Chen
DOI:10.1016/j.tetlet.2009.08.111
日期:2009.11
β-amino acids 1 and 2 are presented by means of an alternative route to the asymmetric Michael-addition route reported in the preceding article. These two compounds, which bind to the α2δ subunit of calcium channels and have important medical applications, have been prepared on multi-kilogram scale in our pilot plant through a new approach that introduces the chirality at the β-carbon via asymmetric
β-氨基酸1和2的合成是通过前一篇文章中报道的不对称Michael加成路线的替代路线来实现的。这两种化合物均与钙通道的α2δ亚基结合并具有重要的医学应用,它们是通过一种新方法在中试工厂中以千克级规模制备的,该新方法通过烯酰胺的不对称加氢在β-碳原子上引入手性。前体。发现两种基于Rh的催化剂(R)-mTCFP-Rh(COD)BF 4和(R)-binapine-Rh(COD)BF 4在此转化过程中具有较高的非对映选择性。描述了用于催化剂选择的方法开发。