Simple route to 3-(2-indolyl)-1-propanones via a furan recyclization reaction
摘要:
A simple route to 1-R-3-(2-indolyl)-1-propanones has been elaborated based on recyclization of 2-(2-aminobenzyl)furan derivatives. Being a modification of the Reissert indole synthesis, our approach employs the furan ring as a source of carbonyl function. This approach is general and allows varying of substituents in aromatic ring as well as in 3-position of indole nucleus. (c) 2006 Elsevier Ltd. All rights reserved.
Intramolecular Palladium-Catalyzed Oxidative Amination of Furans: Synthesis of Functionalized Indoles
作者:Anton S. Makarov、Maxim G. Uchuskin、Vladimir Gevorgyan
DOI:10.1021/acs.joc.8b02470
日期:2018.11.16
Unconventional modification of palladium-catalyzed oxidative amination where a furan ring serves as a masked olefin is described. The designed chemical process provides 2-(2-acylvinyl)indole derivatives with up to a 93% yield and excellent E-selectivity. A highly reactive α,β-unsaturated carbonyl moiety of the obtained compounds allows for accessing various heteroaromatic scaffolds through simple synthetic
Furan ring opening—indole ring closure: a new modification of the Reissert reaction for indole synthesis
作者:Alexander V Butin、Tat‘yana A Stroganova、Irina V Lodina、Gennady D Krapivin
DOI:10.1016/s0040-4039(01)00066-1
日期:2001.3
A new modification of the Reissert reaction is reported. On treatment of 2-tosylaminobenzylfurans with ethanolic HCl, some indole derivatives have been obtained. The furanring served as the origin of a carbonyl group in this reaction.
Synthesis of Indoles by Domino Reaction of 2-(Tosylamino)benzyl Alcohols with Furfurylamines: Two Opposite Reactivity Modes of the α-Carbon of the Furan Ring in One Process
作者:Maxim G. Uchuskin、Natalia V. Molodtsova、Sergey A. Lysenko、Vladimir N. Strel'nikov、Igor V. Trushkov、Alexander V. Butin
DOI:10.1002/ejoc.201301762
日期:2014.4
An unusual dominoreaction where the same furanα-carbon atom reacts initially as a nucleophile and then as an electrophile is reported. In the presence of acid, N-tosylfurfurylamines react with 2-(tosylamino)benzylalcohols to afford 2-(2-acylvinyl)indoles. The reaction proceeds by Friedel–Crafts alkylation at the C(2) atom of furan followed by acid-catalyzed intramolecular nucleophilic attack of
Furan ring opening—indole ring closure: pseudooxidative furan ring opening in the synthesis of indoles
作者:Alexander V. Butin、Sergey K. Smirnov
DOI:10.1016/j.tetlet.2005.09.057
日期:2005.11
A new approach to the synthesis of 4-(2-indolyl)-3-buten-2-ones is described based on condensation of 2-tosylaminobenzyl alcohols with N-tosylfurfurylamine. Pseudooxidative furanring opening occurred via protolytic elimination of tosylamide from the side chain of the 2-tosylaminoaryl(5-tosylaminomethylfur-2-yl)methanes formed in situ.