The reaction of nitrones with various indole derivatives has been studied. When the reaction was promoted by ClSiMe3, the isolated products were 3,3'-diindolylalkanes. With HCl as the activating reagent, 3-indolylhydroxylamines were isolated. The diastereoselectivity of this condensation with a nitrone derived from cysteine was investigated. A method for the introduction of an alkylhydroxylamino group onto position 2 of indole, the synthesis of three natural 3,3'-diindolylalkanes and of non-symmetric diindolylalkanes are also reported. (C) 2000 Elsevier Science Ltd. All rights reserved.
The reaction of nitrones with indoles. Synthesis of asymmetrical diindolylalcanes
作者:Jean-Noël Denis、Hélène Mauger、Yannick Vallée
DOI:10.1016/s0040-4039(97)10302-1
日期:1997.12
The reaction of nitrones with indoles in the presence of HCl gives indolyl N-hydroxylamines. In the presence of Me3SiCl symmetrical diindolylalcanes are obtained. A synthesis of asymmetrical diindolylalcanes and the syntheses of three natural symmetrical diindolylalcanes are reported. (C) 1997 Published by Elsevier Science Ltd.