1-Acylindoles react regioselectively with alpha-halogenoacyl chloride in the presence of aluminum chloride to produce 1-acyl-6-halogenoacylindoles in excellent
Reported herein is a visible‐light‐mediated radical approach to the α‐alkylation of ketones. This method exploits the ability of a nucleophilic organocatalyst to generate radicals upon SN2‐based activation of alkyl halides and blue light irradiation. The resulting open‐shell intermediates are then intercepted by weakly nucleophilic silyl enol ethers, which would be unable to directly attack the alkyl
A Direct Access to 7-Aminoindoles via Iridium-Catalyzed Mild C–H Amidation of <i>N</i>-Pivaloylindoles with Organic Azides
作者:Youyoung Kim、Juhyeon Park、Sukbok Chang
DOI:10.1021/acs.orglett.6b00662
日期:2016.4.15
Ir(III)-catalyzed regioselective directC-7amidation of indoles in reaction with organic azides has been developed. While its efficiency was varied by the choice of N-directing groups, N-pivaloylindoles were most effective in undergoing the desired amidation at roomtemperature over a broad range of substrates. The reaction was scalable, and deprotection of the chelation group was also facile.
A systematic study of two complementary protocols allowing the general, mild and efficient deprotection of N-pivaloylindoles
作者:Míriam Ruiz、J. Domingo Sánchez、Pilar López-Alvarado、J. Carlos Menéndez
DOI:10.1016/j.tet.2011.10.098
日期:2012.1
of indoles and related fused heterocyclic systems are described, involving either hydride transfer from LDA or hydrolysis by the DBU–water system. Both methods were shown to tolerate a wide variety of substituents and functional groups, but the hydrolytic one proved to be particularly general, being compatible with 2-alkyl substituents, aldehydes, ketones, carboxylic acids, halogens, ethers, amides