Facile access to 4-(1-alkynyl)-2(5H)-furanones by Sonogashira coupling of terminal acetylenes with β-tetronic acid bromide: efficient synthesis of cleviolide
摘要:
A mild and convenient synthesis of 4-(1-alkynyl)-2(5H)-furanones has been achieved by Sonogashira or Heck-type alkynylation of beta-tetronic acid bromide. As an illustration of this methodology, the natural product cleviolide was prepared in two steps and 78% overall yield. (c) 2006 Elsevier Ltd. All rights reserved.
Vinyl nosylates as partner in copper and silver co-catalyzed Sonogashira cross-coupling reactions
作者:Nicolas P. Cheval、Barbara Hoffmann、Anna Dikova、Fatih Sirindil、Philippe Bertus、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1016/j.tet.2018.10.017
日期:2018.12
Vinylnosylates, readily obtained from β-dicarbonyl derivatives, could be efficiently engaged in Sonogashira cross-couplingreactions, either cocatalyzed by copper or silver salts. The para-nitrobenzenesulfonate (nosylate) group allows this coupling to be performed under very mild conditions (room temperature). These new leaving group and mild conditions could be applied to the synthesis of acetylenic
Facile access to 4-(1-alkynyl)-2(5H)-furanones by Sonogashira coupling of terminal acetylenes with β-tetronic acid bromide: efficient synthesis of cleviolide
作者:John Boukouvalas、Sébastien Côté、Bruno Ndzi
DOI:10.1016/j.tetlet.2006.10.156
日期:2007.1
A mild and convenient synthesis of 4-(1-alkynyl)-2(5H)-furanones has been achieved by Sonogashira or Heck-type alkynylation of beta-tetronic acid bromide. As an illustration of this methodology, the natural product cleviolide was prepared in two steps and 78% overall yield. (c) 2006 Elsevier Ltd. All rights reserved.