The Catalytic Synthesis of N-Aryl Indoles Featuring an Alternative Disconnection. Hydroaminoalkylation for a Telescoped Reaction Sequence
Organic Letters(2022)
摘要
A tricatalytic telescoped synthesis toward C3-methyl-N-aryl indoline and indole products is reported. An in situ generated tantalum(V) ureate catalyst is used for the hydroaminoalkylation of o-chlorostyrene with N-methylaniline to first make C-sp(3)-C-sp(3) bond. Subsequent nickel-catalyzed C-N coupling forms N-aryl indolines, and if desired, subsequent oxidation to N-aryl indoles can be achieved using catalytic [Cu(MeCN)(4)]BF4 and tert-butylperoxy-2-ethylhexyl carbonate as the terminal oxidant. This strategy highlights an alternative C-C bond disconnection for the synthesis of indoles, which is enabled by the atom-economic hydroaminoalkylation reaction. The method was streamlined using a three-step, two-pot approach to afford up to 73% overall isolated yield of variously substituted C3-methyl-N-aryl indoles.
更多查看译文
关键词
hydroaminoalkylation,catalytic synthesis,telescoped reaction sequence
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要