Rhodium(iii)-catalyzed C2-selective carbenoid functionalization and subsequent C7-alkenylation of indoles
作者:Jingjing Shi、Yunnan Yan、Qiu Li、H. Eric Xu、Wei Yi
DOI:10.1039/c4cc01593b
日期:——
versatile method for efficient synthesis of a diverse range of 2-acetate substituted indoles via Rh(III)-catalyzed and alcohol-mediated C2-selective carbenoidinsertion functionalization of indoles by alpha-diazotized Meldrum'sacid has been developed. Furthermore, for the first time, a Rh(III)/Cu(II)-catalyzed direct C7-alkenylation of such functionalized products has also been demonstrated.
Iridium(III)-Catalyzed Regioselective Carbenoid Insertion C-H Alkylation by α-Diazotized Meldrum's Acid
作者:Honggui Lv、William L. Xu、Kunhua Lin、Jingjing Shi、Wei Yi
DOI:10.1002/ejoc.201601212
日期:2016.12
straightforward protocol for IrIII-catalyzed regioselective carbenoid insertion C–H alkylationmediated by α-diazotized Meldrum's acid was developed. The assistance of external additives and oxidants was not needed, and the developed IrIII catalysis proceeds in a highly efficient manner (e.g., mild reaction conditions, short reaction times and excellent regioselectivity) and demonstrates good compatibility
A rhodium-catalysed direct formylmethylation adopting vinylenecarbonate as an ethynol equivalent is reported. The developed catalytic system is further utilised for the oxidant-free production of esters with the liberation of hydrogen gas. Some control experiments are conducted to elucidate the reaction mechanism.