Pd/C-Catalyzed Cyclizative Cross-Coupling of Two<i>ortho</i>-Alkynylanilines under Aerobic Conditions: Synthesis of 2,3′-Bisindoles
作者:Bo Yao、Qian Wang、Jieping Zhu
DOI:10.1002/chem.201501020
日期:2015.5.11
A palladium‐catalyzed cyclizative cross‐coupling of two o‐alkynylanilines to 2,3′‐bisindoles underaerobic oxidative conditions was developed. Mechanistic studies suggested that the two catalytic cycles, namely the formation of 3‐alkynylindoles 8 and their subsequent cyclization to bisindoles 5, are temporally separated. The aminopalladation of 3‐alkynylindoles 8 occurred only after all the N,N‐di