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
[EN] BISPHENYL COMPOUNDS USEFUL AS VITAMIN D3 RECEPTOR AGONISTS<br/>[FR] COMPOSES DE BISPHENYLE UTILES EN TANT QU'AGONISTES DE RECEPTEURS DE LA VITAMINE D3
申请人:CHUGAI PHARMACEUTICAL CO LTD
公开号:WO2005087700A3
公开(公告)日:2006-10-19
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).