A Practical Synthesis of Valuable Strained Eight‐Membered‐Ring Derivatives for Click Chemistry

A convenient and cost‐effective synthetic access to cyclooctyne and trans‐cyclooctene derivatives is described. A cyclopropanation step using copper powder in place of Rh2(OAc)4 as catalyst and a symmetric diazomalonate resulted in a drastic decrease in the overall cost of the synthesis. Further der...

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Veröffentlicht in:European journal of organic chemistry 2018-05, Vol.2018 (17), p.2000-2008
Hauptverfasser: Bernard, Sabrina, Kumar, Ramar Arun, Porte, Karine, Thuéry, Pierre, Taran, Frédéric, Audisio, Davide
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Sprache:eng
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Zusammenfassung:A convenient and cost‐effective synthetic access to cyclooctyne and trans‐cyclooctene derivatives is described. A cyclopropanation step using copper powder in place of Rh2(OAc)4 as catalyst and a symmetric diazomalonate resulted in a drastic decrease in the overall cost of the synthesis. Further derivatizations allowed us to characterize, for the first time, the structure of a BCN analogue by X‐ray crystallography, and to obtain a library of derivatives that could potentially be useful for applications in metal‐free click chemistry. A convenient and cost‐effective synthetic access to cyclooctyne and trans‐cyclooctene derivatives is described. A cyclopropanation step using copper powder in place of Rh2(OAc)4 as catalyst and a symmetric diazomalonate resulted in a drastic decrease in the overall cost of the synthesis.
ISSN:1434-193X
1099-0690
DOI:10.1002/ejoc.201800139