2,3-Difunctionalized Indoles via Radical Acylation or Trifluoromethylation of <i>ortho</i>-Alkynylphenyl Isonitriles
作者:Dirk Leifert、Frauke Weidlich、Florin Adler、Constantin G. Daniliuc、Fatmah A. Alasmary、Armido Studer
DOI:10.1021/acs.orglett.1c03916
日期:2022.1.14
A radical cascade to 2,3-disubstituted indoles proceeding via acylation or trifluoromethylation of ortho-alkynylphenyl isonitriles is presented. In these cascades, two C–C bonds and one C–O bond are formed using an inexpensive oxidant and a catalytic copper or iron salt. The starting isonitriles are easily accessible, and commercially available aldehydes and fluoromethylation reagents serve as reaction
Palladium‐Catalyzed Domino Synthesis of 2,3‐Difunctionalized Indoles
<i>via</i>
Migratory Insertion of Isocyanides in Batch and Continuous Flow
作者:Su Chen、Monica Oliva、Luc Van Meervelt、Erik V. Van der Eycken、Upendra K. Sharma
DOI:10.1002/adsc.202100339
日期:2021.7
We report, herein, a palladium-catalyzed cascade comprising carbopalladation, migratoryinsertion of isocyanide and triple bond activation followed by a nucleophilic attack (OR−) to construct difunctionalized acyl indoles. The process involves multiple bond formations via key palladium-chemistry steps, to construct these bis-heterocycles containing two privileged scaffolds (indole and oxindole) in
New Access to 2,3-Disubstituted Quinolines through Cyclization of <i>o</i>-Alkynylisocyanobenzenes
作者:Michinori Suginome、Takeshi Fukuda、Yoshihiko Ito
DOI:10.1021/ol991133w
日期:1999.12.1
[GRAPHICS]o-Alkynylisocyanobenzenes underwent nucleophile-induced intramolecular cyclization to give 2,3-disubstituted quinoline derivatives in high yields. In addition to the oxygen and nitrogen nucleophiles such as methanol and diethylamine, the nucleophilic carbon of the enolate of malonate induced the cyclization effectively. Reaction of 1,4-di(trimethylsilylethynyl)-2,3-diisocyanobenzene with methanol afforded 2,9-dimethoxy-1,10-phenanthroline in good yield.
Cascades to Substituted Indoles
作者:Jon D. Rainier、Abigail R. Kennedy
DOI:10.1021/jo000831n
日期:2000.9.1
This paper describes the synthesis of dithioindoles from the free-radical cyclizations of arylisonitriles having pendant alkynes. Also described is the synthesis of substituted indoles and spiro-fused indoles from the coupling of dithioindoles with active hydrogen-containing compounds.