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.
A Concise and Efficient Novel Synthesis of Cleviolide
作者:Renzo Rossi、Fabio Bellina、Matteo Biagetti
DOI:10.1080/00397919908085969
日期:1999.10
Cleviolide 1 has been synthesized in 73 % overall yield by a short reaction sequence involving the preparation of 4-methyl-1-trimethylsilylpent-3-en-1-yne 7 from trimethylsilylethynylzinc chloride 6 and 1-bromo-2-methylpropene 5, the direct conversion of 7 into the corresponding 1-tributylstannyl derivative 8 and the Pd-catalysed reaction of this organotin derivative with 4-bromofuran-2(5H)-one 10.
Directing Tandem Catalyzed Reactions as an Approach to Furans and Butenolides
作者:Barry M. Trost、Matthias C. McIntosh
DOI:10.1021/ja00132a030
日期:1995.7
Synthesis of cleviolide and the scobinolides
作者:Gregory J. Hollingworth、Alexandre M. E. Richecoeur、Joseph Sweeney
DOI:10.1039/p19960002833
日期:——
The palladium-catalysed cross-coupling reaction of 4-tributylstannylfuran-2(5H)-one 3 with 1-iodo-4-methylpent-3-en-1-yne 4a gives the natural product cleviolide; from this substance may be prepared both (Z)- and (E)-isomers of scobinolide.