作者:Philippe A. Peixoto、Rene Severin、Chih-Chung Tseng、David Y.-K. Chen
DOI:10.1002/anie.201008000
日期:2011.3.21
Enticing structures: The formal syntheses of 1 and 2 were accomplished by using a cascade strategy involving an enyne cycloisomerization reaction and an intramolecular Diels–Alder reaction starting from 3. The resulting 4 underwent a late‐stage ring contraction to enable the preparation of a reported advanced intermediate, thereby constituting a formalsynthesis of the structurally intriguing title