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 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.