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.
general method for the synthesis of indole‐1‐carboxamides was developed via copper(I)‐catalyzed N‐carboxamidation of indoles with isocyanates under mild reaction conditions. This process is scalable and tolerates a wide spectrum of indoles and isocyanates to deliver the corresponding products in good to excellent yields, providing a viable synthetic approach to indole‐1‐carboxamides.
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