Bulk Gold-Catalyzed Reactions of Diazoalkanes with Amines and O2 to Give Enamines
作者:Yibo Zhou、Robert J. Angelici、L. Keith Woo
DOI:10.1007/s10562-010-0339-7
日期:2010.6
particles, catalyzes reactions of diazoalkanes E(H)C=N2, where E is CO2Et or PhC(O), with amines R1R2NH and O2 to give enamine products (R1R2N)(E)C=CH(E) in 58–94% yield. The reactions are proposed to occur by initial formation of surface-bound (E)(H)C: carbene groups that are attacked by nucleophilic amines. The enamine products are very different than those obtained in reactions catalyzed by homogeneous
散装金粉,由大约 5-50 μm 的颗粒组成,催化重氮烷烃 E(H)C=N2,其中 E 是 CO2Et 或 PhC(O),与胺 R1R2NH 和 O2 反应生成烯胺产物 (R1R2N)(E) C=CH(E),产率为 58-94%。这些反应被认为是通过最初形成表面结合的 (E)(H)C:被亲核胺攻击的卡宾基团而发生的。烯胺产物与由均相过渡金属配合物催化的反应中获得的产物有很大不同。重氮烷、胺和 O2 的这些反应代表了一种新型的本体金催化反应。