Enantioselective Robinson-Type Annulation Reaction Catalyzed by Chiral Phosphoric Acids
作者:Takahiko Akiyama、Takuya Katoh、Keiji Mori
DOI:10.1002/anie.200901127
日期:2009.5.25
differences: Implementation of an enantioselective Michael addition followed by an intramolecular aldol reaction catalyzed by two phosphoric acids has enabled the synthesis of cyclohexenone derivatives with excellent enantioselectivities. Prominent kinetic resolution was observed in the latter reaction. Ar=aromatic group, X=H, halogen, Y=H, Me, halogen.
让我们解决分歧:实现对映选择性迈克尔加成反应,然后通过两种磷酸催化的分子内羟醛反应,可以合成具有优异对映选择性的环己烯酮衍生物。在后一反应中观察到明显的动力学拆分。Ar =芳族基团,X = H,卤素,Y = H,Me,卤素。