Pd(II)-Catalyzed Synthesis of Carbolines by Iminoannulation of Internal Alkynes via Direct C−H Bond Cleavage Using Dioxygen as Oxidant
作者:Shengtao Ding、Zhuangzhi Shi、Ning Jiao
DOI:10.1021/ol100272s
日期:2010.4.2
A palladium-catalyzed iminoannulation of internal alkynes via direct C−H bond cleavage was developed. Dioxygen was employed as a clean oxidant in this kind of catalysis. Carbolines were synthesized from tert-butylimines of N-substituted indole-2-carboxaldehydes or indole-3-carboxaldehydes.
Transient Imine as a Directing Group for the Metal-Free <i>o</i>-C–H Borylation of Benzaldehydes
作者:Supriya Rej、Naoto Chatani
DOI:10.1021/jacs.0c13013
日期:2021.2.24
simple metal-free approach, utilizing an imine transient directinggroup. The strategy covers a wide spectrum of reactions and (i) even highly sterically hindered C–H bonds can be borylated smoothly, (ii) despite the presence of other potential directinggroups, the reaction selectively occurs at the o-C–H bond of the benzaldehyde moiety, and (iii) natural products appended to benzaldehyde derivatives can