Total Synthesis and Structural Reassignment of Lyngbyaloside C Highlighted by Intermolecular Ketene Esterification
作者:Chia-Fu Chang、Eric Stefan、Richard E. Taylor
DOI:10.1002/chem.201502132
日期:2015.7.20
classic macrolide, isolated from Lyngbya bouilloni, has shown moderate anticancer activity against several cancer cell lines. Here, we report the first totalsynthesis and stereochemical configuration reassignment of lyngbyaloside C. The synthesis highlights a one‐pot intermolecular ketene esterification reaction to form the crucial tertiary ester and tetrahydropyran. In addition, a novel and concise
Total Synthesis of (+)-Lactiflorin by an Intramolecular [2+2] Photocycloaddition
作者:Ping Lu、Thorsten Bach
DOI:10.1002/anie.201106889
日期:2012.1.27
Enlightning synthesis: A light‐induced intramolecular [2+2] photocycloaddition reaction (1→2) was the key step in the stereoselective synthesis of (+)‐lactiflorin (3) and its triacetate. By comparison with reported analytical data, it was possible to unambiguously elucidate the structure of this natural product, to which three different structures had been previously assigned.