Use of a Readily Removable Auxiliary Group for the Synthesis of Pyrrolidones by the Palladium-Catalyzed Intramolecular Amination of Unactivated γ C(sp<sup>3</sup>)H Bonds
作者:Gang He、Shu-Yu Zhang、William A. Nack、Qiong Li、Gong Chen
DOI:10.1002/anie.201305615
日期:2013.10.11
Easy on, easy off: Directing groups found to promote the palladium‐catalyzed amination of γ C(sp3)H and C(sp2)H bonds of secondary amides included 5‐methoxy‐8‐aminoquinoline, which can be removed under mild conditions (see scheme; CAN=ceric ammonium nitrate). In conjunction with a β‐CH methylation or γ‐CH arylation step, the γ‐C(sp3)H amination provided access to complex pyrrolidones from readily
容易上手,容易下手:发现可促进仲酰胺的钯催化的γC(sp 3)H和C(sp 2)H键的钯催化胺化反应,包括5-甲氧基-8-氨基喹啉,可将其除去在温和条件下(请参阅方案; CAN =硝酸硝酸铈)。结合使用β- CH甲基化或γ- CH芳基化步骤,可以使γ-C(sp 3)H胺化反应从易得的前体中获得复杂的吡咯烷酮。