Palladium-Catalyzed Dearomative Allylic Alkylation of Indoles with Alkynes To Synthesize Indolenines with C3-Quarternary Centers
作者:Shang Gao、Zijun Wu、Xinxin Fang、Aijun Lin、Hequan Yao
DOI:10.1021/acs.orglett.6b01947
日期:2016.8.5
A palladium-catalyzed dearomative allylicalkylation of indoles with alkynes to construct indolenines with C3-quarternary centers was reported. The in situ formed arylallene intermediate omitted the need to install leaving groups on the allylic compounds and employ extra oxidants to oxidize the allylic C–H bonds. The reaction exhibited good functional group tolerance and high atom economy. Moreover
2,3,4,9- TETRAHYDRO-1H-CARBAZOLE DERIVATIVES AS CRTH2 RECEPTOR ANTAGONISTS
申请人:Fecher Anja
公开号:US20090270414A1
公开(公告)日:2009-10-29
The invention relates to novel tetrahydro-1H-carbazole derivatives and their use as active ingredients in the preparation of pharmaceutical compositions. The invention also concerns related aspects including processes for the preparation of the compounds, pharmaceutical compositions containing one or more of those compounds and methods of treatment comprising administration of said compounds to patients.
Substituted indole derivatives, processes for the preparation thereof, medicinal products and pharmaceutical compositions containing these compounds and the use of substituted indole derivatives to treat pain and other conditions and for other medical purposes.
Palladium-catalyzed intermolecular allenylation reactions of 2,3-disubstituted indoles and allenyl carbonate
作者:Yizhan Zhai、Shu-Li You、Shengming Ma
DOI:10.1039/c9ob01435g
日期:——
palladium-catalyzed intermolecular allenylation of non-strained 2,3-disubstitutedindoles and allenyl carbonate has been developed, providing convenient access to indolenines bearing an allene unit by taking advantage of the C-3 nucleophilicity of indoles. Decent yields and good functional group tolerance have been achieved with diverse indoles under mild conditions. Gram-scale reaction and various synthetic
indole-2,3-epoxide equivalent, 2-hydroxyindoline-3-triethylammonium bromide, was found to be a convenient reagent for formal C3-electrophilic reactions of indoles with various nucleophiles. By taking advantage of the nucleophilic character of the oxygen of the 2-hydroxyindoline, the interrupted retro-Claisen and interrupted Feist–Bénary reactions with 1,3-dicarbonyl compounds were efficiently achieved.