Facile Asymmetric Synthesis of the Core Nuclei of Xanthanolides, Guaianolides, and Eudesmanolides
作者:Bernd Nosse、Rakeshwar B. Chhor、Won Boo Jeong、Claudius Böhm、Oliver Reiser
DOI:10.1021/ol034141s
日期:2003.3.1
Bicylic and tricyclic gamma-butyrolactones with 5,7-, 5,6,5-, 5,6,6-, or 5,7,5-fused ring systems, being found in xanthanolides, eudesmanolides, and guaianolides, were readily synthesized from methyl furan-2-carboxylic acid. Key steps were a copper(I)-catalyzed asymmetric cyclopropanation, Sakurai allylations, intramolecular ene reactions, and ring-closing metathesis reactions.