An enantioselectiveintramolecular Pictet–Spengler type annulation of indole-linked 3-methyleneisoindolin-1-ones was developed by using a chiral phosphoric acid as a catalyst. This method enabled the construction of a series of chiral isoindolinone fused tetrahydro β-carbolines in moderate to good yields (up to 97%) with moderate to good enantioselectivities (up to 96% ee). Furthermore, an α1-AR antagonist
Asymmetric Synthesis of Tetrahydro-β-carbolines <i>via</i> Chiral Phosphoric Acid Catalyzed Transfer Hydrogenation Reaction
作者:Qin Yin、Shou-Guo Wang、Shu-Li You
DOI:10.1021/ol400995c
日期:2013.6.7
Chiral phosphoric acidcatalyzed enantioselective transfer hydrogenation of hydroxylactams has been realized to provide enantioenriched tetrahydro-β-carbolines in dioxane at room temperature (up to 94% yield, 90% ee).