Cobalt(I)-Catalysed Neutral Diels-Alder Reactions of Nitrogen-Functionalised Alkynes
作者:Gerhard Hilt、Fabrizio Galbiati
DOI:10.1055/s-2005-863732
日期:——
Imide, sulfimide and amide type protection of nitrogen-functionalised alkynes proofed to be effective protective groups tolerated in cobalt(I)-catalysed Diels-Alder reactions of 1,3-dienes.
A Modular Approach for the Synthesis of Dibenzoazepine Derivatives
作者:Gerhard Hilt、Fabrizio Galbiati、Klaus Harms
DOI:10.1055/s-2006-942511
日期:2006.11
A straightforward reaction sequence consisting of a Sonogashira coupling of protected propargylic amines, a cobalt-catalysed neutral Diels-Alder reaction, DDQ oxidation of the dihydroaromatic intermediate, a sodium borohydride reduction and an acid induced Friedel-Crafts-type cyclisation approach incorporating four simple starting materials leads to polyfunctionalised polycyclic products. Based on the electronic, steric and structural preconditions either seven-membered dibenzoazepine derivatives or alternatively six- or eight-membered isoindoline derivatives are formed.