Synthetic studies on the cornexistins: synthesis of (±)-5-epi-hydroxycornexistin
作者:J. Stephen Clark、John M. Northall、Frédéric Marlin、Bastien Nay、Claire Wilson、Alexander J. Blake、Michael J. Waring
DOI:10.1039/b811245b
日期:——
The synthesis of 5-epi-hydroxycornexistin (44), a diastereoisomer of the herbicidal natural product hydroxycornexistin (2) has been completed. Palladium mediated sp(2)-sp(3) coupling of the stannane 25 and the chloride 31 and ring-closing metathesis of the resulting diene 32 has been used to construct the tricyclic lactone 34a, which possesses the nine-membered carbocyclic core found in the natural
Synthesis of the Carbocyclic Core of the Cornexistins by Ring-Closing Metathesis
作者:J. Stephen Clark、Frederic Marlin、Bastien Nay、Claire Wilson
DOI:10.1021/ol027265y
日期:2003.1.1
An advanced intermediate in the synthesis of the phytotoxins cornexistin and hydroxycornexistin has been synthesized. Sequential palladium-mediated sp(2)-sp(3) fragment coupling and ring-closing diene metathesis have been used to construct the nine-membered carbocyclic core found in the natural products. [reaction--see text]