Palladium Catalyzed C−C and C−N Bond Formation via <i>ortho</i>
C−H Activation and Decarboxylative Strategy: A Practical Approach towards <i>N</i>
-Acylated Indoles
作者:Saurabh Kumar、Rahul Singh、Krishna Nand Singh
DOI:10.1002/adsc.201700872
日期:2018.2.1
A concerted palladium catalyzed C−H activation and decarboxylative strategy has been explored for the efficient synthesis of N‐acylated indoles. The process allows a facile step‐ and atom‐economic assembly of 3‐arylated indole ring from inexpensive and readily available anilides and cinnamic acids as reacting partners.
using the kinetically generated enolate, followed by Zn reduction of a nitro group of the resulting adducts produced the nitrones which were then treated with aceticanhydride to induce aromatization by dehydration and N-acetylation, which furnished the desired indoles by the DDQ oxidation. This methodology provides an easy entry toward various poly-substituted 6-alkoxyindoles.