Oxidative Furan-to-Indole Rearrangement. Synthesis of 2-(2-Acylvinyl)indoles and Flinderole C Analogues
作者:Anton S. Makarov、Anton A. Merkushev、Maxim G. Uchuskin、Igor V. Trushkov
DOI:10.1021/acs.orglett.6b00805
日期:2016.5.6
Oxidative rearrangement of 2-(2-aminobenzyl)furans affording 2-(2-acylvinyl)indoles in a stereocontrolled manner in good-to-excellent yields has been developed. Thus, (2-aminobenzyl)furans with electron-releasing alkoxy substituents in the phenyl group form only E-isomers of 2-(2-acylvinyl)indoles. Conversely, substrates without such substituents produce target products as Z-isomers exclusively. A
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