Rh-catalyzed oxidative C2-alkenylation of indoles with alkynes: unexpected cleavage of directing group
作者:Satyasheel Sharma、Sangil Han、Youngmi Shin、Neeraj Kumar Mishra、Hyunji Oh、Jihye Park、Jong Hwan Kwak、Beom Soo Shin、Young Hoon Jung、In Su Kim
DOI:10.1016/j.tetlet.2014.04.001
日期:2014.5
A rhodium-catalyzed oxidative C2-alkenylation of indoles containing a N-(p-tolyl)carboxamide group with substituted alkynes via CC bond formation and subsequent CN bond cleavage has been described. This protocol represents direct access to C2-alkenylated free (NH)-indoles, which are important building blocks in the synthesis of natural and pharmacological compounds.
Synthesis of Indole-Fused Oxepines via C–H Activation Initiated Diastereoselective [5 + 2] Annulation of Indoles with 1,6-Enynes
作者:Xiaoli Huang、Yan Shi、Yongzhuang Wang、Jiao Jiao、Yuhai Tang、Jing Li、Silong Xu、Yang Li
DOI:10.1021/acs.orglett.1c03106
日期:2021.11.5
A rhodium-catalyzed diastereoselective formal [5 + 2] annulation of indoles with cyclohexadienone-containing 1,6-enynes has been established via indole 2,3-difunctionalization. The reaction, probably proceeding through tandem indole C2–H alkenylation and intramolecular Friedel–Crafts alkylation relay, provides rapid construction of indole-fused oxepines in good to excellent yields with a broad substrate