22051-15-6Relevant articles and documents
Synthesis of 3-acylindoles by oxidative rearrangement of 2-aminochalcones using a hypervalent iodine reagent and cyclization sequence
Nakamura, Akira,Tanaka, Satoshi,Imamiya, Akira,Takane, Reo,Ohta, Chiaki,Fujimura, Kazuma,Maegawa, Tomohiro,Miki, Yasuyoshi
, p. 6702 - 6705 (2017)
An efficient one-pot method was developed for the construction of 3-acylindoles via oxidative rearrangement of 2-aminochalcones followed by intramolecular cyclization. The reaction was used to convert a variety of 2-aminochalcones into 3-acylindoles in mo
Decarboxylative acylation of: N -free indoles enabled by a catalytic amount of copper catalyst and liquid-assisted grinding
Yu, Jingbo,Zhang, Chao,Yang, Xinjie,Su, Weike
supporting information, p. 4446 - 4451 (2019/05/16)
A facile decarboxylative acylation of N-free indoles with α-ketonates via liquid-assisted grinding was reported. The reaction requires only a catalytic amount of Cu(OAc)2·H2O in combination with O2 as the terminal oxidant to give various 3-acylindoles with high efficiency. Additionally, this new methodology was applicable to a gram-scale synthesis.
Hydrogen bond donor solvents enabled metal and halogen-free Friedel–Crafts acylations with virtually no waste stream
Liu, Guangchang,Xu, Bo
supporting information, p. 869 - 872 (2018/02/09)
We have developed a metal and halogen-free Friedel–Crafts acylation protocol with virtually no waste stream generation. We propose a hydrogen bonding donor solvent will form a hydrogen bonding network and may provide significant rate enhancement for Friedel–Crafts reactions. Trifluoroacetic acid is one of the strongest H-bond donor solvents, which is also volatile and can be easily recovered by distillation without need for reaction workup. Our protocol is a ‘green’ Friedel–Crafts acylation process: 1) the catalyst can be recovered and reused; 2) using halogen free starting material (carboxylic acids anhydride or carboxylic acids); 3) no need for aqueous reaction work-up; 4) minimum or no waste steam generation.