A sensitive family: The first totalsynthesis of the antitumor agents neolaulimalide and isolaulimalide as well as a highly efficient route to laulimalide is described. A Kulinkovich reaction followed by a cyclopropyl–allyl rearrangement is used to install the exo‐methylene group. The cytotoxicity of neolaulimalide could be confirmed for the first time since its original isolation and it could be shown
Total Synthesis of Neolaulimalide and Isolaulimalide
作者:Andreas Gollner、Johann Mulzer
DOI:10.1021/ol802075v
日期:2008.10.16
The first total syntheses of the potential antitumoral leads neolaulimalide (2) and isolaulimalide (3) have been achieved. Key steps in our convergent, fully stereocontrolled route are a Yamaguchi macrolactonization, a Julia-Lythgoe-Kocienski olefination, a Kulinkovich reaction, and a cyclopropyl-allyl rearrangement to install the exo-methylene group. Overall, we synthesized 2 in 21 linear steps (3% yield) and 3 in 24 steps (2% yield).