Palladium-Catalyzed Regioselective Coupling of Secondary Propargyl Carbonates and Ethyl 2-(pyridin-2-yl)acetate Derivatives: Facile Access to C-3 Benzylated Indolizines
作者:Yuzhu Yang、Ting Wu、Youlai Fang
DOI:10.1055/s-0037-1609552
日期:2018.9
A palladium-catalyzed ligand controlled regioselective coupling reaction of secondary propargyl carbonates and ethyl 2-(pyridin-2-yl)acetate derivatives has been described, leading to C-3 benzylated indolizines for the first time in moderate to good yields. DBFphos as the ligand is crucial to this high regioselective annulation reaction, and a plausible reaction mechanism has been proposed.
已经描述了钯催化的配体控制的仲炔碳酸酯和 2-(吡啶-2-基)乙酸乙酯衍生物的区域选择性偶联反应,从而首次以中等至良好的产率得到 C-3 苄基化吲哚腙。DBFphos 作为配体对于这种高区域选择性的环化反应至关重要,并且已经提出了一种合理的反应机制。